A203747 v(n+1)/v(n), where v=A203746.

2, 25, 1300, 666536, 1866588100, 40227366213200, 5615962423683300000, 5515452582144085933300000, 36695607554641784976763692852800, 1681984849693348507666402129737211600000

Offset

1,1

Comments

See A093883 for a discussion and guide to related sequences.

Links

Table of n, a(n) for n=1..10.

Mathematica

f[j_] := Fibonacci[j]; z = 11;
u := Product[f[j]^2 + f[k]^2, {j, 1, k - 1}]
v[n_] := Product[u, {k, 2, n}]
Table[v[n], {n, 1, z}]          (* A203746 *)
Table[v[n + 1]/v[n], {n, 1, z}] (* A203747 *)

Crossrefs

Sequence in context: A014050 A015214 A204234 * A278273 A210836 A369675

Adjacent sequences: A203744 A203745 A203746 * A203748 A203749 A203750

Keyword

nonn

Author

Clark Kimberling, Jan 05 2012

Status

approved