In number theory, an octahedral number is a figurate number that represents the number of spheres in an octahedron formed from close-packed spheres. The...

In mathematics, a centered octahedral number or Haüy octahedral number is a figurate number that counts the points of a three-dimensional integer lattice...

Fibonacci number 17971 = palindromic prime 17977 = number of partitions of 36 17990 = weird number 17991 = Padovan number 18010 = octahedral number 18181...

number of partially ordered set with 7 unlabeled elements 2047 – super-Poulet number, Woodall number, decagonal number, a centered octahedral number,...

sequence (85,23,1,0). an octahedral number. a centered triangular number. a centered square number. a decagonal number. the smallest number that can be expressed...

tile the plane by translation 1469 = octahedral number, highly cototient number 1470 = pentagonal pyramidal number, sum of totient function for first 69...

the cube, and they have the same three-dimensional symmetry groups, the octahedral symmetry O h {\displaystyle \mathrm {O} _{\mathrm {h} }} . The regular...

72 × 17, octagonal number (sequence A000567 in the OEIS), a centered octahedral number 834 = 2 × 3 × 139, cake number, sphenic number, sum of six consecutive...

Riordan number 30694 = open meandric number 30941 = first base 13 repunit prime 31116 = octahedral number 31185 = number of partitions of 39 31337 = cousin...

9. 25 is a centered octagonal number, a centered square number, a centered octahedral number, and an automorphic number. 25 percent (%) is equal to ⁠1/4⁠...

In chemistry, octahedral molecular geometry, also called square bipyramidal, describes the shape of compounds with six atoms or groups of atoms or ligands...

one-fourth of a larger tetrahedral number. The sum of two consecutive square pyramidal numbers is an octahedral number. The pyramidal numbers were one of...

It is the eighth highly cototient number, and the fourth centered octahedral number after 7 and 25. For five unlabeled elements, there are 63 posets....

number in decimal. It is the tenth 10-happy number, and the fourth octahedral number. It is a square-prime of the form p2 × q, and fourth of this form...

non-palindromic number in any base, following 11 and preceding 47. 19 is also the second octahedral number, after 6, and the sixth Heegner number. In the Engel...

hundred [and] forty-six) is the natural number following 145 and preceding 147. 146 is an octahedral number, the number of spheres that can be packed into...

hexagonal number, an octahedral number and a centered octahedral number. 231 is palindromic in base 2 (111001112). 231 is the number of integer partitions...

223, Blum integer 670 = 2 × 5 × 67, sphenic number, octahedral number, nontotient 671 = 11 × 61. This number is the magic constant of n×n normal magic square...

43, octahedral number, noncototient, totient sum of the first 33 integers, refactorable number. 345 = 3 × 5 × 23, sphenic number, idoneal number 346 =...

nontotient, refactorable number, φ(488) = φ(σ(488)), number of surface points on a cube with edge-length 10. 489 = 3 × 163, octahedral number 490 = 2 × 5 × 72...

sphenic number 3276 – tetrahedral number 3277 – 5th super-Poulet number, decagonal number 3279 – first composite Wieferich number 3281 – octahedral number, centered...

pyramidal number 25724 = Fine number 25920 = smallest number with exactly 70 factors 26015 = number of partitions of 38 26214 = octahedral number 26227 =...

integer. 129 is a repdigit in base 6 (333). 129 is a happy number. 129 is a centered octahedral number. "Sloane's A016105 : Blum integers". The On-Line Encyclopedia...

problem for n = 22. 5340 – octahedral number 5350 - sum of the first 51 primes 5356 – triangular number 5365 – decagonal number 5381 – super-prime 5387 –...

It is: palindromic in bases 10 (57510) and 13 (35313). a centered octahedral number. And the sum of the squares of the first 575 primes is divisible by...

7073 – Leyland number 7079 – Sophie Germain prime, safe prime 7103 – Sophie Germain prime, sexy prime with 7109 7106 – octahedral number 7109 – super-prime...

8119 – octahedral number; 8119/5741 ≈ √2 8125 – pentagonal pyramidal number 8128 – perfect number, harmonic divisor number, 127th triangular number, 64th...

Kaprekar's constant 6181 – octahedral number 6200 – harmonic divisor number 6201 – square pyramidal number 6216 – triangular number 6217 – super-prime, prime...

42680 = octahedral number 42875 = 353 42925 = square pyramidal number 43261 = Markov number 43380 = number of nets of a dodecahedron 43390 = number of primes...

Germain prime 9224 – octahedral number 9241 – cuban prime of the form x = y + 1 9261 = 213, largest 4 digit perfect cube 9272 – weird number 9283 – centered...