1,2
See A093883 for a discussion and guide to related sequences.
Table of n, a(n) for n=1..6.
f[j_] := j!; z = 8;
u[n_] := Product[f[j]^2 + f[k]^2, {j, 1, k - 1}]
v[n_] := Product[u[n], {k, 2, n}]
Table[v[n], {n, 1, z}] (* A203689 *)
Table[v[n + 1]/v[n], {n, 1, z}] (* A203690 *)
Sequence in context: A292334 A202156 A117711 * A116140 A243235 A145530
Adjacent sequences: A203686 A203687 A203688 * A203690 A203691 A203692
nonn
Clark Kimberling, Jan 04 2012
approved
