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%I #7 Jan 14 2013 10:19:07
%S 1,7,15652,4466072310336,257010442859540072735404130304,
%T 12039114411811108434329752218564963041089979745446343475200
%N Vandermonde sequence using x^2 + xy + y^2 applied to (1,2,6,...,n!).
%C See A093883 for a discussion and guide to related sequences.
%t f[j_] := j!; z = 8;
%t u[n_] := Product[f[j]^2 + f[j] f[k] + f[k]^2,
%t {j, 1, k - 1}]
%t v[n_] := Product[u[n], {k, 2, n}]
%t Table[v[n], {n, 1, z}] (* A203685 *)
%t Table[v[n + 1]/v[n], {n, 1, z}] (* A203686 *)
%K nonn
%O 1,2
%A _Clark Kimberling_, Jan 04 2012
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