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A203582 v(n+1)/v(n), where v=A203581. 2
19, 1036, 116571, 22656816, 6814202907, 2944470267648, 1733264443684683, 1335544723529452800, 1305986008348685022723, 1581171893218923245420544, 2322926322016811685175726011, 4072369789139269227339542851584 (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[j] f[k] + f[k]^2,

{j, 1, k - 1}], {k, 2, n}]

Table[v[n], {n, 1, z}]          (* A203581 *)

Table[v[n + 1]/v[n], {n, 1, z}] (* A203582 *)

CROSSREFS

Sequence in context: A238740 A285862 A136022 * A136021 A195214 A213864

Adjacent sequences:  A203579 A203580 A203581 * A203583 A203584 A203585

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 04 2012

STATUS

approved

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Last modified September 26 01:55 EDT 2021. Contains 347664 sequences. (Running on oeis4.)