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 A374862 #4 Aug 28 2024 10:57:05
%S A374862 0,1,18,256,5400,153664,4251528,146410000,5159780352,215051077696,
%T A374862 10497600000000,516094438514944,28802430771288192,1806336000000000000,
%U A374862 113638807576776480768,7916729578225695719424,558793544769287109375000,42995640737555012867053824
%N A374862 Obverse convolution A000201**A000201; see Comments.
%C A374862 See A374848 for the definition of obverse convolution and a guide to related sequences. a(2k+1) is a square for k>=0.
%t A374862 r = GoldenRatio;
%t A374862 s[n_] := Floor[n*r];
%t A374862 u[n_] := Product[s[k] + s[n - k], {k, 0, n}]
%t A374862 Table[u[n], {n, 0, 20}]
%Y A374862 Cf. A000201, A001622, A374848.
%K A374862 nonn
%O A374862 0,3
%A A374862 _Clark Kimberling_, Aug 18 2024