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 A203703 #7 Jan 14 2013 08:32:58
%S A203703 1,19,36309,20948005533,24919574917127246811,
%T A203703 37290617923502980706808072360699,
%U A203703 314561785062386659424554771537320893773619041293,7385768555672581968376838404040832050105039776598686978378826098029
%N A203703 Vandermonde sequence using x^2 + xy + y^2 applied to the first n primes.
%C A203703 See A093883 for a discussion and guide to related sequences.
%t A203703 f[j_] := Prime[j]; z = 11;
%t A203703 u := Product[f[j]^2 + f[j] f[k] + f[k]^2, {j, 1, k - 1}]
%t A203703 v[n_] := Product[u, {k, 2, n}]
%t A203703 Table[v[n], {n, 1, z}] (* A203703 *)
%t A203703 Table[v[n + 1]/v[n], {n, 1, z}] (* A203704 *)
%K A203703 nonn
%O A203703 1,2
%A A203703 _Clark Kimberling_, Jan 05 2012