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 A374867 #10 Mar 21 2025 02:23:20
%S A374867 1,6,40,504,8640,221760,8087040,426888000,32620363776,3648685824000,
%T A374867 602632706457600,148439180079590400,55016878371840000000,
%U A374867 30938118932878961836032,26590262111772239462400000,35154873540222607725345792000,71898404594761985678156759040000
%N A374867 Obverse convolution (2n+1)**A000045; see Comments.
%C A374867 See A374848 for the definition of obverse convolution and a guide to related sequences.
%t A374867 s[n_] := 2 n + 1; t[n_] := Fibonacci[n];
%t A374867 u[n_] := Product[s[k] + t[n - k], {k, 0, n}]
%t A374867 Table[u[n], {n, 0, 20}]
%Y A374867 Cf. A005408, A000045, A374848.
%K A374867 nonn
%O A374867 0,2
%A A374867 _Clark Kimberling_, Aug 28 2024