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 A368775 #10 Jan 05 2024 07:56:41
%S A368775 1,3,37,1333,106641,15996151,4031030053,1580163780777,910174337727553,
%T A368775 737241213559317931,810965334915249724101,1177521666296942599394653,
%U A368775 2204320559307876546066790417,5215422443322435907994026126623
%N A368775 a(n) = (n+1) * (n!)^3 * Sum_{k=0..n} 1/((k+1) * (k!)^3).
%F A368775 a(n) = (n+1) * n^2 * a(n-1) + 1.
%o A368775 (PARI) a(n) = (n+1)*n!^3*sum(k=0, n, 1/((k+1)*k!^3));
%Y A368775 Cf. A217284, A368776.
%Y A368775 Cf. A228229, A368771.
%K A368775 nonn
%O A368775 0,2
%A A368775 _Seiichi Manyama_, Jan 05 2024