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 A374872 #6 Sep 11 2024 13:36:17
%S A374872 2,8,72,1680,126000,38811960,61785091368,616892274180000,
%T A374872 45374160012072012000,28175746072918961153889000,
%U A374872 166250736077540332478371155891000,10349136183590980028259106116944710102320,7466148323412227422384379930251940448396455130000
%N A374872 Obverse convolution (2n+1)**(n!); see Comments.
%C A374872 See A374848 for the definition of obverse convolution and a guide to related sequences.
%t A374872 s[n_] := 2 n + 1; t[n_] := n!;
%t A374872 u[n_] := Product[s[k] + t[n - k], {k, 0, n}]
%t A374872 Table[u[n], {n, 0, 13}]
%Y A374872 Cf. A005408, A000142, A374848.
%K A374872 nonn
%O A374872 0,1
%A A374872 _Clark Kimberling_, Aug 28 2024