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 A203701 #7 Jan 14 2013 08:32:16 %S A203701 1,5,650,16663400,478518525316000,113232587986394983843360000, %T A203701 1438710315085989348124673236473864000000000, %U A203701 6858373830854236318613852813305507279474257818061600000000000000 %N A203701 Vandermonde sequence using x^2 + y^2 applied to the Fibonacci numbers (1,2,3,5,...F(n+1)). %C A203701 See A093883 for a discussion and guide to related sequences. %t A203701 f[j_] := Fibonacci[j + 1]; z = 11; %t A203701 u[n_] := Product[f[j]^2 + f[k]^2, {j, 1, k - 1}] %t A203701 v[n_] := Product[u[n], {k, 2, n}] %t A203701 Table[v[n], {n, 1, z}] (* A203701 *) %t A203701 Table[v[n + 1]/v[n], {n, 1, z}] (* A203702 *) %K A203701 nonn %O A203701 1,2 %A A203701 _Clark Kimberling_, Jan 04 2012