Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #8 Sep 14 2024 16:47:25
%S 1,4,75,3600,314721,42928704,8362250379,2196324000000,746766466070625,
%T 318799285706474496,166848786507705952491,105015062916733187395584,
%U 78238953853457166762890625,68086982534559349084416000000,68431651668664224198422729187051
%N Obverse convolution (n^2)**(n^2+1); see Comments.
%C See A374848 for the definition of obverse convolution and a guide to related sequences.
%F a(n) ~ exp((Pi-4)*n/2) * n^(2*n+2). - _Vaclav Kotesovec_, Sep 13 2024
%t s[n_] := n^2; t[n_] := n^2 + 1;
%t u[n_] := Product[s[k] + t[n - k], {k, 0, n}]
%t Table[u[n], {n, 0, 20}]
%Y Cf. A000290, A002522, A374848.
%K nonn
%O 0,2
%A _Clark Kimberling_, Sep 13 2024