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

Author

Alois P. Heinz, Oct 22 2018

Keywords

• nonn

Links

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

Crossrefs

Column k=10 of A284249.

Cf. A000217.