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A203585 Vandermonde sequence using x^2 + y^2 applied to (2,3,...,n+1). 3
1, 13, 6500, 262769000, 1500305882400000, 1885591784499143760000000, 753074404854223679800035840000000000, 130639388303516205847055577677763494400000000000000 (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_] := 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}]          (* A203585 *)

Table[v[n + 1]/v[n], {n, 1, z}] (* A203586 *)

CROSSREFS

Sequence in context: A263160 A032463 A298273 * A191937 A210157 A213410

Adjacent sequences:  A203582 A203583 A203584 * A203586 A203587 A203588

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 04 2012

STATUS

approved

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Last modified June 14 19:28 EDT 2021. Contains 345038 sequences. (Running on oeis4.)