A116989 a(n) = b(A000579(n+6)) with b(n) = Sum{d|n} d*(d+1)*(d+2)*(d+3)*(d+4)*(d+5)/720.

1, 925, 1135716, 593223373, 130220375812, 14195655302684, 893936543319276, 36397263567477054, 1025115791220794876, 21899052879460199956, 372805053916689840596, 5076066733212581886566, 57875038239259949679248

Offset: 0

Author

Jonathan Vos Post, Apr 02 2006

Keywords

• easy
• nonn

Crossrefs

Cf. A000579, A007437, A101289, A116963.

Programs

PARI

a(n) = sumdiv(binomial(n+6, 6), d, d*(d+1)*(d+2)*(d+3)*(d+4)*(d+5)/720) /* Georg Fischer, Aug 03 2025 */

Extensions

Definition corrected by Georg Fischer, Aug 03 2025