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A038157 a(n) = n! * Sum_{k=1..n-2} 1/k!. 1
0, 0, 0, 6, 36, 200, 1230, 8652, 69272, 623520, 6235290, 68588300, 823059732, 10699776672, 149796873590, 2246953104060, 35951249665200, 611171244308672, 11001082397556402, 209020565553571980, 4180411311071439980, 87788637532500240000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..21.

Index entries for sequences related to factorial numbers

FORMULA

a(n) = floor(n!*exp(1)) - n - 1 - n! for n>1. - Mark van Hoeij, Oct 30 2011

MATHEMATICA

a=1; Table[a=(a-n)*(n+1); Abs[a], {n, 0, 40}] (* Vladimir Joseph Stephan Orlovsky, Nov 20 2009 *)

CROSSREFS

Sequence in context: A261520 A232138 A000551 * A267468 A225685 A006812

Adjacent sequences:  A038154 A038155 A038156 * A038158 A038159 A038160

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified August 24 16:16 EDT 2019. Contains 326295 sequences. (Running on oeis4.)