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A203589 Vandermonde sequence using x^2 + y^2 applied to (1,3,5,...,2n-1). 3
1, 10, 8840, 1897064000, 192924579369600000, 15340654595434137315840000000, 1423341281300698059502838358528000000000000, 215088732628531399592688671811428988579913728000000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A093883 for a discussion and guide to related sequences.

LINKS

Table of n, a(n) for n=1..8.

MATHEMATICA

f[j_] := 2 j - 1; z = 12;

v[n_] := Product[Product[f[j]^2 + f[k]^2, {j, 1, k - 1}], {k, 2, n}]

Table[v[n], {n, 1, z}]          (* A203589 *)

Table[v[n + 1]/v[n], {n, 1, z}] (* A203590 *)

CROSSREFS

Sequence in context: A229152 A125543 A291562 * A109893 A208781 A125544

Adjacent sequences:  A203586 A203587 A203588 * A203590 A203591 A203592

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 04 2012

STATUS

approved

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Last modified May 9 16:32 EDT 2021. Contains 343742 sequences. (Running on oeis4.)