1,1
See A093883 for a discussion and guide to related sequences.
Table of n, a(n) for n=1..7.
f[j_] := j!; z = 8;
u[n_] := Product[f[j]^2 - f[j] f[k] + f[k]^2,
{j, 1, k - 1}]
v[n_] := Product[u[n], {k, 2, n}]
Table[v[n], {n, 1, z}] (* A203687 *)
Table[v[n + 1]/v[n], {n, 1, z}] (* A203688 *)
Sequence in context: A283017 A093189 A163430 * A253578 A167472 A199040
Adjacent sequences: A203685 A203686 A203687 * A203689 A203690 A203691
nonn
Clark Kimberling, Jan 04 2012
approved
