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 A203584 #7 Jan 14 2013 03:51:23
%S A203584 7,156,7581,656208,89536707,17762943744,4839641971353,
%T A203584 1735971516115200,793577924924099679,450587906648152326144,
%U A203584 311210374980947172777333,256996405562850515826561024
%N A203584 v(n+1)/v(n), where v=A203583.
%C A203584 See A093883 for a discussion and guide to related sequences.
%t A203584 f[j_] := j + 1; z = 12;
%t A203584 v[n_] := Product[Product[f[j]^2 - f[j] f[k] + f[k]^2,
%t A203584 {j, 1, k - 1}], {k, 2, n}]
%t A203584 Table[v[n], {n, 1, z}] (* A203583 *)
%t A203584 Table[v[n + 1]/v[n], {n, 1, z}] (* A203584 *)
%K A203584 nonn
%O A203584 1,1
%A A203584 _Clark Kimberling_, Jan 04 2012