ⓘ मुक्त ज्ञानकोश. क्या आप जानते हैं? पृष्ठ 117

                                               

184 (संख्या)

Factors 184: 2 3 x 23. 184 is a refactorable number, or Tau number that is divided by the number of its divisors. 184 has eight dividers, 8 is one of them. 184 is the sum of four consecutive primes 41 43 47 53. 184-the difference 2 size of the ro ...

                                               

185 (संख्या)

185 is a composite number. 185 is the sum of two square numbers in two different ways: 13 2 4 2 11 2 and 8 2. 185-the difference 2 size of the room: 21 2 - 16 2. 185 is an odd number. 185 is insufficient number, as 43 is less than 185. 185 is a 2 ...

                                               

186 (संख्या)

186 is a 14-gonal number and the 63-gonal number. 186 is an even number. 186 square-free number. (186 квадратных бесплатному номеру) 186 abundant number, as 198 is greater than 186. There are 186 degree 11 irreducible polynomials over the Galois ...

                                               

187 (संख्या)

Divisors of 187 are 1, 11, 17, 187. 187 is the sum of 3 consecutive primes: 61 59 67. The Prime factors of 187: 11 × 17. 187 is a composite number. 187-the difference 2 size of the room: 14 2 - 3 2 and 94 -93 2. 187 square-free number. (187 квадр ...

                                               

189 (संख्या)

189 is: The sum of divisors of the first 15 natural numbers. Lucky number. (Счастливое число) Insufficient number, as 131 is less than 189. In Harshad number in bases 3, 4, 5, 6, 7, 11, 13, 15 and 28 other grounds. A Ulam number. (А Улам количест ...

                                               

19 (संख्या)

19 is the natural number following 18 and preceding 20. Its a Prime number. In English speech, the numbers 19 and 90 are sometimes confused because they sound similar.

                                               

191 (संख्या)

Prime Gauss. (Премьер-Гаусса) 191 is an odd number. 191 is a lazy caterer, number of slices a circle can be done in 19 slices can divide 191 pieces. 191 insufficient number because 1 is less than 191. Eisenstein Prime with no imaginary part. 191 ...

                                               

193 (संख्या)

193 is only an odd Prime P known for which 2 is not a primitive root of 4 R 2 1 {\the style property display the value of the 4P^{2} 1}. 193 is a Prime number. 193-full Prime reptend. (193-полный премьер-reptend) 193 is an odd number. 193 is a lu ...

                                               

194 (संख्या)

194 the smallest Markov number that is neither a Fibonacci number nor a Pell number. 194 square-free number. (194 квадратных бесплатному номеру) 194-the number of irreducible representations of the monster group. 194 is a nontotient, since there ...

                                               

195 (संख्या)

195 is a composite number. 195 is an odd number. 195 is a Harshad number. Although not the Prime Minister himself, Ulams 195 passes through a sieve and, thus, it is a lucky number. 195 is the smallest number that is represented as the sum of squa ...

                                               

196 (संख्या)

A Lychrel number is a natural number which cannot form a number is a palindrome through the iterative process of repeatedly reversing its digits and adding the resulting numbers. 196 least amount assumes the Lychrel number in base 10, the process ...

                                               

197 (संख्या)

197 is a strong Prime. 197 is a twin Prime with 199. 197 is a Prime number. 197 is a Chen Prime. 197 equal to the sum of the first twelve numbers: 2 3 5 7 11 13 17 19 23 29 31 37. 197-third of the Prime quadruplet: 191, 193, 197, 199. 197 is the ...

                                               

198 (संख्या)

198 composite number. (198 составное число) 198 practical room. (198 практическая номер) 198 is an even number. 198 is the number itself. 198 is a Harshad number, divisible by the sum of its digits. 198 is a large number, as 270 is greater than 1 ...

                                               

199 (संख्या)

199 is a Lucas number. 199 is a permutable Prime, which may have their numbers changed, and create another Prime number 991. 199 is an inadequate number of, since it is the sum of aliquot 1 less than 199. 199 is a Chen Prime. 199 is a Prime numbe ...

                                               

दो

2 is a number numeral and glyph. It is the natural number following 1 and preceding 3. This is the smallest and only even Prime number. Because it forms the basis of duality, it has religious and spiritual significance in many cultures.

                                               

2.147.483.647

The number 2.147.483.647 is the eighth Mersenne Prime, equal to 2 31 − 1. It is one of four known double Mersenne primes. The division of this number was proven by Leonhard Euler, who reported the proof in a letter to Daniel Bernoulli written in ...

                                               

20 (संख्या)

20 is the number of moves a quarter or half turns required to optimally solve a Rubiks cube in the worst case. 20 can be written as a sum of three Fibonacci numbers uniquely, i.e. 20 = 13 5 2. 20 is the basis for vigesimal number systems. 20 is t ...

                                               

200 (संख्या)

200 is the natural number following 199 and preceding 201. The number appears in the Padovan sequence, preceded by 86, 114, 151 is the sum of the first two of them. The sum φx Eulers totient function for the first twenty five integers is 200. 200 ...

                                               

2000 (संख्या)

2000-the natural number following 1999 and preceding 2001. Two thousand is the largest number is expressed using only two unmodified characters in Roman numerals mm.

                                               

205 (संख्या)

205 is a lucky number, and Wolstenholme number. On an infinite chessboard, a knight can reach exactly 205 squares within four moves. There are 205 different ways of forming a connected graph by adding six edges of a set of five labeled vertices.

                                               

21 (संख्या)

21 is: The smallest number of different sized squares needed to square the square. A composite number, its proper divisors 1, 3 and 7. The Fibonacci series. (Ряд Фибоначчи) The smallest natural number that is not a power of 2, n 2, where the rang ...

                                               

210 (संख्या)

210 is a composite number, an abundant number, and the product of the first four primes 2, 3, 5, and 7, and thus a primorial. It is also the least common multiple of these four Prime numbers. This is the sum of eight consecutive numbers 13 17 19 ...

                                               

212 (संख्या)

Unit 212, an Israeli commando unit, also known as Maglan. 212-the code for international direct dial phone calls to Morocco. Helicopter Bell 212. (Вертолет Bell 212) 212 fragrance by Carolina Herrera. Submarine Type 212. (Подводная Лодка Типа 212 ...

                                               

217 (संख्या)

217 is a natural number after the previous 216 and 218. 217 is a centered hexagonal number, 12-gonal row, center 36-gonal number, Fermat pseudoprime to the base 5, and the number of Blum. This is the sum of two positive cubes and the difference o ...

                                               

218 (संख्या)

218 is a natural number after the previous 217 and 219. Mertens function218 = 3, a record high. 218-the number of non-equivalent color options 12 edges of the cube, using no more than 2 colors, where two colorings are equivalent if they only diff ...

                                               

22 (संख्या)

22 is an even composite number and conjugacy of finitely generated subgroups of a free, its proper divisors are 1, 2 and 11. "2-2" is the only fixed point is John Conways look and say function. 22 is the sum of the totient function for the first ...

                                               

222 (संख्या)

222 is the natural number following 221 and preceding 223. It is a decimal repdigit and a strobogrammatic number means that it looks the same turned on the display of the calculator. This is one of the numbers of digits of the sum in decimal is t ...

                                               

229 (संख्या)

229 is the natural number following previous 228 and 230. Its a Prime number, and a normal Prime. It is also a full reptend Prime means that the decimal expansion of fractions unit 1 / 229 is repeated periodically over a specified period as possi ...

                                               

23 (संख्या)

23 is a Wedderburn–Etherington number. The codewords in the perfect accommodation extended binary Golay code are of size 23. According to the birthday paradox in a group of 23 or more randomly chosen, the probability is more than 50% that some of ...

                                               

230 (संख्या)

230 is: The sum of the coprime counts for the first 27 numbers. A composite number with divisors to be 2, 5, 10, 23, 46, and 115. In Harshad number in bases 2, 6, 10, 12, 23 and 16 other grounds. Part 41-aliquot tree. (Часть 41-Алиготе дерево) In ...

                                               

237 (संख्या)

237 is a natural number after the previous 236 and 238. 237 is a lucky number, and one of the numbers in the sequence Aronsons. 237-th square pyramidal number, 4465475, also consists of two small square Pyramidal numbers. There are only four smal ...

                                               

239 (संख्या)

Its a Prime number. The next is 241, with which it forms a couple of simple numbers-twins, therefore, it is also a Chen Prime. 239 is a Sophie Prime-Germain and Newman–Shanks–Williams Prime. This is a Prime, so it is no imaginary part and real pa ...

                                               

24 (संख्या)

24 is the natural number following 23 and preceding 25. SI prefix for 10 24 is yotta, and for 10 -24, i.e., the reciprocal of 10 24 yocto G. These numbers are the largest and smallest number to get the prefix si today.

                                               

240 (संख्या)

240-is: The concatenation of two proper divisors. Part 12161-aliquot tree. The aliquot sequence starting at 120s: 120, 240, 504, 1056, 1968, 3240, 7650, 14112, 32571, 27333, 12161, 1, 0. In a semiperfect number. In Harshad number in bases 2, 3, 4 ...

                                               

243 (संख्या)

243 is: Only the 3-digit number that is the fifth power is 3 5. Perfect totient number. (Прекрасное totient число) The sum of five consecutive primes 41 43 47 53 59. In Harshad number. (В номер Harshad) 82-gonal number. (82-гонал количество)

                                               

25 (संख्या)

Is a square number, being 5 2 = 5 × 5. This is one of two two-digit numbers whose square and higher powers of numbers and ends in same last two digits, e.g., 25 2 = 625, and the other 76. This is the smallest square that is the sum of two nonzero ...

                                               

250 (संख्या)

250 is the natural number following 249 and preceding 251. Two hundred fifty is also: .250 Savage rifle cartridge. SMTP status code for mail action completed. In Chinese slang, the number 250 means idiot. In the Bible, the number of men rebelling ...

                                               

255 (संख्या)

Its factorization makes it a sphenic number. Since 255 = 2 8 – 1 is the Mersenne number, though not harmful, and the fourth number will not be a simple number. This is a perfect totient number, the smallest such number to be neither energy nor th ...

                                               

256 (संख्या)

256 is a composite number, the factorization 256 = 2 8, making it twice. 256 is the smallest number that is the product of the eight major factors. 256 is only a 3-digit number that is zenzizenzizenzic. This is 2 to the 8th power and 2 {\the styl ...

                                               

257 (संख्या)

257 is a Prime number of the form 2 p 1, {\the style property display set to 2^{2^{N}} 1,} in particular, with N = 3, and therefore the Prime farm. Thus, a regular polygon with 257 sides constructible with compass and ruler without markings. He c ...

                                               

258 (संख्या)

                                               

259 (संख्या)

                                               

26 (संख्या)

Twenty-six repdigit in base three 222 in base 3 and 12 twelve 22. In base ten, 26 is the smallest number that is a palindrome, have an area of 26 2 = 676, which is a palindrome.

                                               

260 (संख्या)

260 is the natural number following 259 and 261 of the previous one. This is also the magic constant of N × N normal magic square and n-Queens problem for N = 8, the size of the actual chess Board. 260 is also the magic constant of the magic squa ...

                                               

261 (संख्या)

six of the divisors of that number, the divisor being 1, 3, 9, 29, 87, 261 itself. 261 is an insufficient number because 1 3 29 87 = 129 &RT 261. 261 is a nonagonal number, Harshad number, unique period in base 2, and the number of possible unfol ...

                                               

263 (संख्या)

263 is a balanced Prime, an irregular Prime Ramanujan, a Chen Prime bar and a safe Prime. This is not a palindrome number and lucky number.

                                               

269 (संख्या)

269 twin Prime, and the Prime of Ramanujan. This is the highest ratio 9! 1 = 362881, and the smallest natural number that cannot be represented as the determinant of the 10 × 10 0.1-matrix.

                                               

27 (संख्या)

It is the basic Foundation for the system septemvigesimal civilizations. There are 27 sporadic groups, if the Tits group is included. Unique simple formally real Jordan algebra, the exceptional Jordan algebra of self-adjoint 3 by 3 matrices of qu ...

                                               

270 (संख्या)

270 is a harmonic divisor number. 270 is the smallest positive integer that has divisors ending in the numbers 1, 2., 9. 270 is the fourth number that is divisible by the average of the integer divider. The sum of the coprime counts for the first ...

                                               

271 (संख्या)

271 twin Prime with 269, Cuban Prime is a Prime number, which is the difference of two consecutive cubes, centered hexagonal number. This is the smallest Prime number in square brackets on both sides of the numbers that are divisible by cubes, an ...

                                               

273 (संख्या)

273 is the natural number following 272 and preceding 274. Figure 273 is a number, a truncated triangular pyramid number. There are 273 different ternary trees with five nodes.

                                               

276 (संख्या)

276-is: In Harshad number in bases 2, 3, 4, 5, 6, 7, 9, 11, 12, 13, 16 and 130 other grounds. The least amount of aliquot sequence which is not yet fully defined. A palindrome in bases 8 424 8, and a repdigit in bases 22 CC 22, 45 66 45, 68 44 68 ...

                                               

277 (संख्या)

277-59-th Prime number, and is a regular Prime. Is the smallest Prime number p, such that the sum of the inverse of primes up to n is greater than two. 59 the Prime Minister, 277 super-Prime. 59 too super-Prime is the 17 th Prime as 17 is the 7th ...

                                               

28 (संख्या)

It is a composite number, its proper divisors 1, 2, 4, 7, and 14. Twenty-eight is the second perfect number. As a perfect number, it refers to the Mersenne Prime 7, since 2 3 − 1 2 3 − 1 = 28. The next perfect number is 496, the previous 6. Twent ...

                                               

280 (संख्या)

The denominator of the eighth harmonic number, 280 is an octagonal number. There are 280 plane trees with ten nodes. As a consequence of this, 18 people around a round table can shake hands with each other in the crossing ways, in 280 different w ...

                                               

281 (संख्या)

281 is the 60th Prime, twin Prime with 283, Sophie Prime-Germain, the sum of the first fourteen primes, sum of seven consecutive primes, Prime Chen, Eisenstein Prime with no imaginary part, centered decagonal number. 281 is the smallest Prime P s ...

                                               

288 (संख्या)

288 pentagonal pyramidal number, 4 surfacially with 288 = 1! 2! 3! 4! 288-its an untouchable number, Harshad number in base 10 and base 12, the number of Achilles, a 3-smooth number and the number itself. Both the 288 and 289 of powerful figures. ...

                                               

29 (संख्या)

None of the first 29 natural numbers have more than two different Prime factors. This is the longest such sequence. This is a Prime, so it is no imaginary part and real part of the form 3n − 1. 29 is also the 10th supersingular Prime. 29 is a Per ...

                                               

290 (संख्या)

The product of three primes, 290 is a sphenic number, sum of four consecutive primes 67 71 73 79. The sum of squares of divisors of 17 is 290. Not only is it a nontotient and a noncototient, it is also an untouchable number. 290 is the 16th membe ...

                                               

291 (संख्या)

This number is the product of four divisors: 1, 3, 97 and 291. The sum of the proper divisors aliquot amount is less than 291, which makes it insufficient quantity. Being a product of two primes, 3 and 97, is connected finitely generated subgroup ...

                                               

तीन

3-number, numeral, and glyph. It is the natural number following 2 and preceding 4, and the smallest odd Prime number. It has religious or cultural significance in many societies.

                                               

30 (संख्या)

Thirty is the sum of the first four squares, which makes it a square pyramidal number. It is a primorial. 30 is the smallest sphenic number, and the smallest shape 2 × 3 × R, Where R is a simple, more 3. 30 and an aliquot sum of 42, the second sp ...

                                               

300 (संख्या)

The number 300 is a triangular number and the sum of pairs of Prime numbers the twin 149 to 151 and also the sum of ten consecutive primes 13 17 19 23 29 31 37 41 43 47. This palindrome in 3 bases: 300 10 = 606 7 = 454 8 = 363 9, and also to the ...

                                               

31 (संख्या)

31-the number of regular polygons with an odd number of sides, which, as is known, it is possible to construct with compass and ruler. 31 is the third Mersenne Prime 2 5 − 1 and the eighth Mersenne Prime exponent as well as the fourth primorial P ...

                                               

311 (संख्या)

311 is the 64th Prime, twin Prime with 313, irregular Prime, But the Prime Minister, so it is no imaginary part and real part of the form 3 P − 1 {\the style property display the value of 3n-1}, a Gaussian Prime with no imaginary part and real pa ...

                                               

32 (संख्या)

32 is the smallest number n with exactly 7 solutions to the equation φx = N. It is also the sum of the totient function for the first ten integers. Fifth power of two, 32 is also a Leyland number a since 2 4 2 = 32. 32 is the ninth happy number. ...

                                               

33 (संख्या)

33-is: The sum of three cubes: 33 = 8866128975287528 3 − 8778405442862239 3 − 2736111468807040 3 {\the style property display value 33=8866128975287528^{3} -8778405442862239^{3} -2736111468807040^{3}}. The sum of the divisors of the first 6 posit ...

                                               

34 (संख्या)

34 is the ninth different conjugacy of finitely generated subgroups of a free and four divisors including one and itself. Its neighbors, 33 and 35, also different semiprimes, having four divisors each, and 34 is the smallest number to be surround ...

                                               

35 (संख्या)

35 is the sum of the first five Triangular numbers, making it a tetrahedral number. 35 is the number of ways that three things can be selected from a set of seven unique things also known as the "combination of seven things taken three at a time. ...

                                               

353 (संख्या)

In connection with Eulers sum of powers conjecture, 353 is the smallest number 4, whose power is equal to the sum of four 4th powers, discovered by R. norrie in 1911: 353 4 = 30 4 + 120 4 + 272 4 + 315 4. {\displaystyle 353^{4}=30^{4}+120^{4}+272 ...

                                               

359 (संख्या)

359° is one degree less than a full rotation of 360° is a reflex angle. 359 is a Prime Sophie-Germain: 2359 1=719 also a Sophie Germain Prime.

                                               

36 (संख्या)

36 as the square of six and a triangular number, making it a square triangular number. It is the smallest square triangular number other than one, and it is also the only triangular number other than one whose square root is also a triangular num ...

                                               

360 (संख्या)

The circle is divided into 360 degrees of angular measurement. 360° = 2π rad is also called round angle. This choice of unit allows round angle should be divided into equal sectors measured in integer degrees, and not fractional degrees. Many poi ...

                                               

363 (संख्या)

363 can be expressed as a sum of three squares in four different ways: 11 2 11 2 11 2, 5 2 7 2 17 2, 1 2 1 2 19 2, and 13 2 13 2 5 2. 363-the number is a palindrome in bases 3, 10, 11 and 32. The Mertens function returns 0. 363-BB is a repdigit i ...

                                               

365 (संख्या)

365 is connected finitely generated subgroups of a Free center square. It is also the fifth 38-gonal number. This is the smallest number that has more than one expression as a sum of consecutive square numbers: 365 = 13 2 + 14 2 {\displaystyle 36 ...

                                               

369 (संख्या)

                                               

37 (संख्या)

Thirty-seven is the 12th Prime number, and a permutable Prime 73, which is the Prime number on the 21st. 37-the fifth Prime was lucky, the first irregular Prime, the third unique Prime and the third Cuban Prime of the form. p = x 3 − y 3 x − y x ...

                                               

38 (संख्या)

38! − 1 gives 523 022 617 466 601 111 760 007 224 100 074 291 199 999 this is a 16-Prime factorial. There are only two normal magic hexagons, order 1 which is trivial and of order 3. The sum of each row of an order 3 magic hexagon is 38. 38 is th ...

                                               

384 (संख्या)

384 is: In Harshad number in bases 2, 3, 4, 5, 7, 8, 9, 13, 17, and 62 other grounds. The sum of six consecutive primes 53 59 61 67 71 73. The double factorial 8. A generous amount. (Щедрое количество) The sum of the main pair of two 191 193. 129 ...

                                               

39 (संख्या)

In the F26A graph is a symmetric graph with edges 39. Thirty-nine is the sum of consecutive primes 3 5 7 11 13 and is a product of the first and last of these consecutive primes. Among small semiprimes only three integers 10, 155 and 371 share th ...

                                               

चार

4-digit, numeral, and glyph. Is a natural number after 3 and before 5. It is the smallest composite number, and are considered unlucky in many East Asian cultures.

                                               

4.294.967.295

The number of 4.294.967.295 is an integer equal to 32 − 1. This is a perfect totient number. Should 4.294.967.294 and precedes 4.294.967.296. It has a factorization 3 ⋅ 5 ⋅ 17 ⋅ 257 ⋅ 65537 {\the style property display set to 3\cDOT 5\cDOT 17\cDO ...

                                               

40 (संख्या)

40 is the natural number below 39 and preceding 41. Although the word itself refers to "Four" 4, the spelling of "forty" to replace with words "forty" during the 17th century and is now the standard form.

                                               

4000 (संख्या)

4900 – 70 2, only square-pyramidal square other than 1. 4901 – centered square number. 4913 – 17th cube. 4941 – centered cube number. 4957 – the sum of three and five consecutive primes 1637 1657 1663, 977 983 991 997 1009. 4993 – balanced Prime. ...

                                               

41 (संख्या)

The sum of three primes 11 13 17. The sum of two squares, 4 2 5 2. The smallest integer whose reciprocal has a 5-digit repetend. This is due to the fact that the 41-factor of 99999. The sum of the divisors of the first 7 positive integers. The la ...

                                               

400 (संख्या)

400 is the square of 20. 400 is the sum of the powers of 7 from 0 to 3, thus making it a repdigit in base 7 1111. A circle divided into 400 Grads, which is equal to 360 degrees and 2π Radians. Degrees and radians are the si accepted units. 400 is ...

                                               

42 (संख्या)

42 forty-two is a pronic number and an abundant number, its Prime factors 2 3 7 makes it the second sphenic number and also the second 2 3 R. Additional properties of the number 42 include: This is a Catalan number. Therefore, 42 is the number of ...

                                               

420 (संख्या)

420 is: 141-gonal number. (141-гонал количество) In pronic number. (В pronic число) The sum of the first 20 positive even integers. The smallest number evenly divided by numbers 1 to 7, and as a consequence that it is a Harshad number in every ba ...

                                               

43 (संख्या)

Forty three is the 14th smallest Prime number. The previous forty-one, with whom she has two Prime, and already forty-seven. 43 is the smallest Prime that is not a Chen Prime. It is also the third school the Prime Minister. 43 is the fourth term ...

                                               

45 (संख्या)

Forty-five is a triangular number, and, in particular, the sum of all decimal digits 0 1 2 3 4 5 6 7 8 9 = 45. This is the smallest number of triangles after 1 which can be written as a sum of two squares. It is also a hexagonal and 16-gonal numb ...

                                               

46 (संख्या)

Forty-six is a Wedderburn-Etherington number, an enneagonal number and a centered triangular number. This is the sum of the totient function for the first twelve numbers. 46 is the largest even number that cannot be expressed as a sum of two abun ...

                                               

47 (संख्या)

47 is the natural number following 46 and preceding 48. Its a Prime number, and appears in popular culture, as adopted by the favorite number of Pomona College and the obsession of the hip-hop collective Pro era.

                                               

48 (संख्या)

Forty-eight is a double factorial of 6, a very difficult number. Like all other multiples of 6, it is a semiperfect number. 48 is the second 17-gonal number. 48 is the smallest number with exactly ten divisors. There are 11 solutions to the equat ...

                                               

495 (संख्या)

495 is the integer after 494 and 496 of the previous. It is a pentatope number {\the style property display the value of {\tbinom {12}{4}}}).

                                               

496 (संख्या)

496 is most notable for the fact that a great number, and one of the first rooms to be recognized as such. As a perfect number it is tied to the Mersenne Prime 31, 2 5 − 1 2 4 2 5 − 1 yielding 496. Also associated with his perfect number, 496 is ...

                                               

पांच

5 is a number, numeral, and glyph. Is a natural number after 4 and before 6, and is a simple number. It has gained importance throughout history, partly because typical humans have five digits on each hand.

                                               

50 (संख्या)

Fifty is the smallest number that is the sum of two non-zero square numbers in two different ways: 50 = 1 2 7 2 = 5 2 5 2. This is the sum of three squares, 50 = 3 2 4 2 5 2, and the sum of four squares, 50 = 6 2 3 2 1 2. It is a Harshad number. ...

                                               

5040 (संख्या)

5040 is a factorial of one less than the square, making a couple brown room, superior high composite number, colossally abundant number, and the number of permutations of 4 items out of 10 choices.

                                               

500 (संख्या)

Five hundred too "500 miles" is a folk song made popular in the world in the 1960-ies. Open play in the ball / disc, sm 500 ball. In the Fiat 500, Italian, car, or multiple cars in the United States, built by Ford: Ford five hundred, not 500 or C ...

                                               

51 (संख्या)

Fifty-one is a pentagonal number and a centered pentagonal number is one of the few numbers to be both and an 18-gonal number and a Perrin number. It is also the 6th Motzkin number indicating the number of ways to draw nonintersecting chords betw ...

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