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

Author

Ilya Gutkovskiy, Jan 30 2023

Keywords

• nonn

Links

• Eric Weisstein's World of Mathematics, Octahedral Number

Crossrefs

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