A334012 a(n) is the least integer that can be expressed as the sum of one or more consecutive nonzero octagonal numbers in exactly n ways.

1, 1045, 5985

Offset

1,2

Links

Table of n, a(n) for n=1..3.

Eric Weisstein's World of Mathematics, Octagonal Number

Index to sequences related to polygonal numbers

Example

From Seiichi Manyama, May 16 2021: (Start)
Let S(k, m) denote the sum of m octagonal numbers starting from k*(3*k-2). We have
a(1) = S(1, 1);
a(2) = S(19, 1) = S(1, 10);
a(3) = S(45, 1) = S(11, 9) = S(1, 18). (End)

Crossrefs

Cf. A000567, A054859, A068314, A186337, A298467, A322637, A334007, A334008, A334010, A334011, A344376.

Sequence in context: A345514 A345767 A324320 * A344376 A023067 A344410

Adjacent sequences: A334009 A334010 A334011 * A334013 A334014 A334015

Keyword

nonn,hard,more

Author

Ilya Gutkovskiy, Apr 12 2020

Status

approved