A334010 a(n) is the least integer that can be expressed as the sum of one or more consecutive nonzero hexagonal numbers in exactly n ways.

1, 703, 274550, 11132303325

Offset

1,2

Links

Table of n, a(n) for n=1..4.

Eric Weisstein's World of Mathematics, Hexagonal Number

Index to sequences related to polygonal numbers

Example

Let S(k, m) denote the sum of m hexagonal numbers starting from the k-th. We have
a(1) = S(1, 1);
a(2) = S(19, 1) = S(13, 2);
a(3) = S(62, 25) = S(184, 4) = S(25, 51);
a(4) = S(3065, 505) = S(22490, 11) = S(1215, 1430) = S(1938, 946).

Crossrefs

Cf. A000384, A054859, A068314, A186337, A298467, A319185, A334007, A334008, A334011, A334012.

Sequence in context: A375918 A161021 A283521 * A257721 A253396 A188370

Adjacent sequences: A334007 A334008 A334009 * A334011 A334012 A334013

Keyword

nonn,hard,more

Author

Ilya Gutkovskiy, Apr 12 2020

Extensions

a(4) from Giovanni Resta, Apr 13 2020

Status

approved