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 A374868 #5 Sep 11 2024 13:36:05
%S A374868 3,10,112,1620,39424,1404000,75841920,6112753920,742328893440,
%T A374868 136268470800000,38081363493888000,16296693648238080000,
%U A374868 10743612584546575319040,10968661020433308192000000,17425075496868344523423744000,43253347261338355732569538560000
%N A374868 Obverse convolution (2n+1)**A000032; see Comments.
%C A374868 See A374848 for the definition of obverse convolution and a guide to related sequences.
%t A374868 s[n_] := 2 n + 1; t[n_] := LucasL[n];
%t A374868 u[n_] := Product[s[k] + t[n - k], {k, 0, n}]
%t A374868 Table[u[n], {n, 0, 20}]
%Y A374868 Cf. A005408, A000032, A374848.
%K A374868 nonn
%O A374868 0,1
%A A374868 _Clark Kimberling_, Aug 28 2024