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 A374884 #8 Sep 14 2024 16:47:25
%S A374884 1,4,75,3600,314721,42928704,8362250379,2196324000000,746766466070625,
%T A374884 318799285706474496,166848786507705952491,105015062916733187395584,
%U A374884 78238953853457166762890625,68086982534559349084416000000,68431651668664224198422729187051
%N A374884 Obverse convolution (n^2)**(n^2+1); see Comments.
%C A374884 See A374848 for the definition of obverse convolution and a guide to related sequences.
%F A374884 a(n) ~ exp((Pi-4)*n/2) * n^(2*n+2). - _Vaclav Kotesovec_, Sep 13 2024
%t A374884 s[n_] := n^2; t[n_] := n^2 + 1;
%t A374884 u[n_] := Product[s[k] + t[n - k], {k, 0, n}]
%t A374884 Table[u[n], {n, 0, 20}]
%Y A374884 Cf. A000290, A002522, A374848.
%K A374884 nonn
%O A374884 0,2
%A A374884 _Clark Kimberling_, Sep 13 2024