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A203586 v(n+1)/v(n), where v=A203585. 2
13, 500, 40426, 5709600, 1256804900, 399383584000, 173474742285000, 98872482630272000, 71645799536067250000, 64368175738481971200000, 70249051303937073666500000, 91567621291850074309120000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See A093883 for a discussion and guide to related sequences.

LINKS

Table of n, a(n) for n=1..12.

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: A116114 A281181 A183479 * A095883 A139168 A174564

Adjacent sequences:  A203583 A203584 A203585 * A203587 A203588 A203589

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 04 2012

STATUS

approved

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Last modified June 23 16:05 EDT 2021. Contains 345402 sequences. (Running on oeis4.)