1,1
See A093883 for a discussion and guide to related sequences.
Table of n, a(n) for n=1..10.
f[j_] := j (j + 1)/2; z = 11;
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}] (* A203693 *)
Table[v[n + 1]/v[n], {n, 1, z}] (* A203694 *)
Sequence in context: A279120 A047788 A251698 * A269896 A087350 A308296
Adjacent sequences: A203691 A203692 A203693 * A203695 A203696 A203697
nonn
Clark Kimberling, Jan 04 2012
approved
