|
| |
|
|
A166554
|
|
a(0)=1, a(n)=n*(a(n-1)-1) for n>0.
|
|
1
| |
|
|
1, 0, -2, -9, -40, -205, -1236, -8659, -69280, -623529, -6235300, -68588311, -823059744, -10699776685, -149796873604, -2246953104075, -35951249665216, -611171244308689, -11001082397556420, -209020565553571999
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,3
|
|
|
FORMULA
| a(n)=-A038156(n) for n>0.
a(n) = n! -floor(e*n!)+1,n>0 [From Gary Detlefs (gdetlefs(AT)aol.com), Jun 06 2010]
|
|
|
MATHEMATICA
| RecurrenceTable[{a[0]==1, a[n]==n(a[n-1]-1)}, a[n], {n, 20}] (* From Harvey P. Dale, Jul 25 2011 *)
|
|
|
CROSSREFS
| Cf. A000142, A165793, A165814
Sequence in context: A021001 A038112 A052512 * A038156 A052846 A056844
Adjacent sequences: A166551 A166552 A166553 * A166555 A166556 A166557
|
|
|
KEYWORD
| sign
|
|
|
AUTHOR
| Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Oct 16 2009
|
| |
|
|
