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A034976 One eighth of octo-factorial numbers. 5
1, 16, 384, 12288, 491520, 23592960, 1321205760, 84557168640, 6088116142080, 487049291366400, 42860337640243200, 4114592413463347200, 427917611000188108800, 47926772432021068185600 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..14.

Index entries for sequences related to factorial numbers

FORMULA

8*a(n) = (8*n)!^8 := product(8*j, j=1..n) = 8^n*n!.

E.g.f.: (-1+(1-8*x)^(-1))/8.

G.f.: x/(1-16x/(1-8x/(1-24x/(1-16x/(1-32x/(1-24x/(1-40x/(1-32x/(1-... (continued fraction). - Philippe Deléham, Jan 07 2012

MATHEMATICA

s=1; lst={s}; Do[s+=n*s; AppendTo[lst, s], {n, 15, 5!, 8}]; lst (* Vladimir Joseph Stephan Orlovsky, Nov 08 2008 *)

CROSSREFS

Cf. A045755, A034908-A034912, A034975, A051189.

Sequence in context: A302805 A303466 A116166 * A114426 A189849 A051360

Adjacent sequences:  A034973 A034974 A034975 * A034977 A034978 A034979

KEYWORD

easy,nonn

AUTHOR

Wolfdieter Lang

STATUS

approved

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Last modified December 6 11:39 EST 2021. Contains 349563 sequences. (Running on oeis4.)