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 A374853 #4 Aug 17 2024 23:10:26
%S A374853 3,16,150,2016,42336,1048320,33679800,1203840000,51753461760,
%T A374853 2778808032000,158404546460160,10690579965542400,793627573939200000,
%U A374853 61438811607613440000,5171227710555658752000,488050626303556459315200,50980860352307128320000000
%N A374853 Obverse convolution (n)**(Prime(n)); see Comments.
%C A374853 See A374848 for the definition of obverse convolution and a guide to related sequences. Conjecture: every positive integer divides a(n) for infinitely many n.
%t A374853 s[n_] := n; t[n_] := Prime[n];
%t A374853 u[n_] := Product[s[k] + t[n + 1 - k], {k, 1, n}]
%t A374853 Table[u[n], {n, 1, 20}]
%Y A374853 Cf. A000040, A374848.
%K A374853 nonn
%O A374853 1,1
%A A374853 _Clark Kimberling_, Aug 05 2024