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 A374888 #5 Sep 15 2024 10:55:32
%S A374888 0,1,24,1260,134400,27825600,10899173376,7971621181440,
%T A374888 10829569720320000,27308175266547302400,128069656186139600486400,
%U A374888 1120848255964556990600970240,18380825707334913958072025088000,567246092895752640232676105650176000
%N A374888 Obverse convolution (n^2)**(2^n-1); see Comments.
%C A374888 See A374848 for the definition of obverse convolution and a guide to related sequences.
%t A374888 s[n_] := n^2; t[n_] := 2^n - 1;
%t A374888 u[n_] := Product[s[k] + t[n - k], {k, 0, n}]
%t A374888 Table[u[n], {n, 0, 20}]
%Y A374888 Cf. A000225, A000290, A374848.
%K A374888 nonn
%O A374888 0,3
%A A374888 _Clark Kimberling_, Sep 14 2024