This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A116989 #8 Aug 04 2025 04:12:35
%S A116989 1,925,1135716,593223373,130220375812,14195655302684,893936543319276,
%T A116989 36397263567477054,1025115791220794876,21899052879460199956,
%U A116989 372805053916689840596,5076066733212581886566,57875038239259949679248
%N 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.
%o A116989 (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 */
%Y A116989 Cf. A000579, A007437, A101289, A116963.
%K A116989 easy,nonn
%O A116989 0,2
%A A116989 _Jonathan Vos Post_, Apr 02 2006
%E A116989 Definition corrected by _Georg Fischer_, Aug 03 2025