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 A203707 #7 Jan 14 2013 04:39:35
%S A203707 1,13,12818,2915787368,1176009940198600000,
%T A203707 444153735961772806005712000000,
%U A203707 772881455545619566045147078787806753280000000,2742931117339129483975618385974064131651632338639360000000000000
%N A203707 Vandermonde sequence using x^2 + y^2 applied to the first n primes.
%C A203707 See A093883 for a discussion and guide to related sequences.
%t A203707 f[j_] := Prime[j]; z = 11;
%t A203707 u := Product[f[j]^2 + f[k]^2, {j, 1, k - 1}]
%t A203707 v[n_] := Product[u, {k, 2, n}]
%t A203707 Table[v[n], {n, 1, z}] (* A203707 *)
%t A203707 Table[v[n + 1]/v[n], {n, 1, z}] (* A203708 *)
%K A203707 nonn
%O A203707 1,2
%A A203707 _Clark Kimberling_, Jan 05 2012