A203702 -id:A203702 - cp's OEIS frontend

A203701 Vandermonde sequence using x^2 + y^2 applied to the Fibonacci numbers (1,2,3,5,...F(n+1)).

1, 5, 650, 16663400, 478518525316000, 113232587986394983843360000, 1438710315085989348124673236473864000000000, 6858373830854236318613852813305507279474257818061600000000000000

Offset: 1

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Clark Kimberling, Jan 04 2012

nonn

See A093883 for a discussion and guide to related sequences.

f[j_] := Fibonacci[j + 1]; z = 11;
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}]          (* A203701 *)
Table[v[n + 1]/v[n], {n, 1, z}] (* A203702 *)

cp's OEIS Frontend

A203701 Vandermonde sequence using x^2 + y^2 applied to the Fibonacci numbers (1,2,3,5,...F(n+1)).

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