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A203688 v(n+1)/v(n), where v=A203687. 2
3, 868, 137683728, 33559369419469824, 30814027871378630714538393600, 228763757339598304909903916639768291573760000, 26160851477909352213716196682766580796112417641624416288768000000 (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..7.

MATHEMATICA

f[j_] := j!; z = 8;

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}]          (* A203687 *)

Table[v[n + 1]/v[n], {n, 1, z}] (* A203688 *)

CROSSREFS

Sequence in context: A283017 A093189 A163430 * A253578 A167472 A199040

Adjacent sequences:  A203685 A203686 A203687 * A203689 A203690 A203691

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 04 2012

STATUS

approved

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Last modified October 16 20:36 EDT 2021. Contains 348047 sequences. (Running on oeis4.)