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 A374879 #7 Sep 14 2024 15:50:14
%S A374879 0,1,12,144,2400,44100,1016064,25401600,752716800,23851713600,
%T A374879 865728864000,33243988377600,1429216756531200,64493406138470400,
%U A374879 3205589417533440000,166232708366376960000,9379957624086763929600,549606892036333824000000,34710813126114757632000000
%N A374879 Obverse convolution (n)**(floor(3n/2)); see Comments.
%C A374879 See A374848 for the definition of obverse convolution and a guide to related sequences.
%C A374879 If k>=0, then a(2k+1) is a square.
%F A374879 a(n) ~ 3^(3*n) * n^(n+1) / (2^(3*n) * exp(n)). - _Vaclav Kotesovec_, Sep 13 2024
%t A374879 s[n_] := n; t[n_] := Floor[3 n/2];
%t A374879 u[n_] := Product[s[k] + t[n - k], {k, 0, n}]
%t A374879 Table[u[n], {n, 0, 24}]
%Y A374879 Cf. A000027, A016789, A374848.
%K A374879 nonn
%O A374879 0,3
%A A374879 _Clark Kimberling_, Sep 13 2024