A329236 a(n) is the least integer that can be expressed as the sum of one or more consecutive centered triangular numbers in exactly n ways.

1, 64, 1789760

Offset

1,2

Comments

If it exists, a(4) > 10^18. - Bert Dobbelaere, Apr 17 2020

Links

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

Eric Weisstein's World of Mathematics, Centered Triangular Number

Crossrefs

Cf. A005448, A054859, A068314, A298467, A322610, A334007.

Sequence in context: A350558 A160864 A017190 * A013847 A017298 A204044

Adjacent sequences: A329233 A329234 A329235 * A329237 A329238 A329239

Keyword

nonn,hard,more

Author

Ilya Gutkovskiy, Apr 13 2020

Status

approved