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 A203743 #7 Jan 09 2013 03:50:12
%S A203743 3,49,3211,1836471,5601269268,126224789371821,18172730429870356071,
%T A203743 18165994225387223595663024,122253429876903823048050870627075,
%U A203743 5642245751352209334312275747406397652667
%N A203743 v(n+1)/v(n), where v=A203742.
%C A203743 See A093883 for a discussion and guide to related sequences.
%t A203743 f[j_] := Fibonacci[j]; z = 11;
%t A203743 u := Product[f[j]^2 + f[j] f[k] + f[k]^2, {j, 1, k - 1}]
%t A203743 v[n_] := Product[u, {k, 2, n}]
%t A203743 Table[v[n], {n, 1, z}] (* A203742 *)
%t A203743 Table[v[n + 1]/v[n], {n, 1, z}] (* A203743 *)
%K A203743 nonn
%O A203743 1,1
%A A203743 _Clark Kimberling_, Jan 05 2012