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 A203705 #7 Jan 14 2013 08:33:27
%S A203705 1,7,2527,142211979,12024567922965507,591714730355757080726211831,
%T A203705 100332562540332311330806684368580850136063,
%U A203705 20912386069949549167880131978888122129614315047176626470563
%N A203705 Vandermonde sequence using x^2 - xy + y^2 applied to the first n primes.
%C A203705 See A093883 for a discussion and guide to related sequences.
%t A203705 f[j_] := Prime[j]; z = 11;
%t A203705 u := Product[f[j]^2 - f[j] f[k] + f[k]^2, {j, 1, k - 1}]
%t A203705 v[n_] := Product[u, {k, 2, n}]
%t A203705 Table[v[n], {n, 1, z}] (* A203705 *)
%t A203705 Table[v[n + 1]/v[n], {n, 1, z}] (* A203706 *)
%K A203705 nonn
%O A203705 1,2
%A A203705 _Clark Kimberling_, Jan 05 2012