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A203676 v(n+1)/v(n), where v=A203675. 2
13, 4453, 9674704, 75224946901, 1545474559060224, 69549952010359093897, 6036862150681054978834432, 921916957672242760231518256521, 231086778644984585535258936647680000 (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..9.

MATHEMATICA

f[j_] := j^2; z = 12;

u[n_] := Product[f[j]^2 - f[j] f[k] + f[k]^2,

  {j, 1, k - 1}]

v[n_] := Product[u[n], {k, 2, n}]

Table[v[n], {n, 1, z}]          (* A203675 *)

Table[v[n + 1]/v[n], {n, 1, z}] (* A203676 *)

CROSSREFS

Sequence in context: A270068 A174310 A057842 * A023345 A249941 A006541

Adjacent sequences:  A203673 A203674 A203675 * A203677 A203678 A203679

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 04 2012

STATUS

approved

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Last modified April 5 19:42 EDT 2020. Contains 333257 sequences. (Running on oeis4.)