A360214 a(n) is the smallest positive integer which can be represented as the sum of distinct nonzero octahedral numbers in exactly n ways, or -1 if no such integer exists.

1, 231, 575, 721, 1618, 1750, 1877, 2240, 2736, 2995, 3105, 3080, 3500, 3311, 3920, 4151, 4280, 4495, 4719, 4621, 4675, 5041, 5164, 5291, 5060, 5591, 5480, 5566, 5635, 5755, 5985, 6216, 6080, 6279, 6320, 6510, 6655, 6636, 6870, 7145, 7195, 6999, 6971, 7296, 7211

Offset

1,2

Links

Table of n, a(n) for n=1..45.

Eric Weisstein's World of Mathematics, Octahedral Number

Crossrefs

Cf. A005900, A275154, A350205, A360215, A360216.

Sequence in context: A324315 A276832 A324319 * A246886 A258167 A287472

Adjacent sequences: A360211 A360212 A360213 * A360215 A360216 A360217

Keyword

nonn

Author

Ilya Gutkovskiy, Jan 30 2023

Status

approved