A320856 Number of 10-element subsets of [n] whose sum is a triangular number.

1, 1, 6, 24, 81, 238, 617, 1456, 3192, 6568, 12821, 23921, 42902, 74326, 124878, 204143, 325604, 507933, 776532, 1165523, 1720164, 2499704, 3580966, 5062537, 7069701, 9760408, 13332198, 18030171, 24156438, 32081010, 42254089, 55220424, 71635678, 92284742

Offset

10,3

Links

Alois P. Heinz, Table of n, a(n) for n = 10..1000

Crossrefs

Column k=10 of A284249.

Cf. A000217.

Sequence in context: A001788 A068711 A344273 * A047790 A133474 A052150

Adjacent sequences: A320853 A320854 A320855 * A320857 A320858 A320859

Keyword

nonn

Author

Alois P. Heinz, Oct 22 2018

Status

approved