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 A368771 #11 Jan 05 2024 07:56:49
%S A368771 0,1,12,333,21328,2666025,575861436,197520472597,101130481969728,
%T A368771 73724121355931793,73724121355931793100,98126805524745216616221,
%U A368771 169563119946759734312830032,372530174523031136285287580473,1022222798891197437966829120818108
%N A368771 a(n) = (n!)^3 * Sum_{k=0..n} k^2/(k!)^3.
%F A368771 a(0) = 0; a(n) = n^3 * a(n-1) + n^2.
%F A368771 a(n) = n^2 * A368775(n-1) for n > 0.
%o A368771 (PARI) a(n) = n!^3*sum(k=0, n, k^2/k!^3);
%Y A368771 Cf. A368769, A368770, A368772.
%Y A368771 Cf. A368775.
%K A368771 nonn
%O A368771 0,3
%A A368771 _Seiichi Manyama_, Jan 05 2024