1,1
See A093883 for a discussion and guide to related sequences.
Table of n, a(n) for n=1..9.
f[j_] := 2^(j - 1); z = 12;
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}] (* A203681 *)
Table[v[n + 1]/v[n], {n, 1, z}] (* A203682 *)
Sequence in context: A156990 A075514 A087306 * A139964 A048797 A163320
Adjacent sequences: A203679 A203680 A203681 * A203683 A203684 A203685
nonn
Clark Kimberling, Jan 04 2012
approved
