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A166554
a(0)=1, a(n) = n*(a(n-1)-1) for n>0.
3
1, 0, -2, -9, -40, -205, -1236, -8659, -69280, -623529, -6235300, -68588311, -823059744, -10699776685, -149796873604, -2246953104075, -35951249665216, -611171244308689, -11001082397556420, -209020565553571999
OFFSET
0,3
LINKS
FORMULA
a(n) = -A038156(n) for n>0.
a(n) = n! - floor(e*n!) + 1, n>0. - Gary Detlefs, Jun 06 2010
a(n) = (n+2)*a(n-1) - (2*n-1)*a(n-2) + (n-2)*a(n-3). - R. J. Mathar, Jul 28 2013
MATHEMATICA
RecurrenceTable[{a[0]==1, a[n]==n(a[n-1]-1)}, a[n], {n, 20}] (* Harvey P. Dale, Jul 25 2011 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Philippe Deléham, Oct 16 2009
STATUS
approved