|
Search: id:A133369
|
|
|
| A133369 |
|
Number of surjections from an n-element set to a ten-element set. |
|
+0
1
|
| |
|
|
OFFSET
|
10,1
|
|
|
FORMULA
|
a(n)=sum((-1)^(10-k)*C(10,k)*k^n) with n>=10 and k=10,9,...,1.
|
|
CROSSREFS
|
Cf. A000918, A000919, A000920, A001117, A001118, A135456.
Sequence in context: A011521 A061603 A133132 this_sequence A071552 A053501 A090074
Adjacent sequences: A133366 A133367 A133368 this_sequence A133370 A133371 A133372
|
|
KEYWORD
|
nonn,bref
|
|
AUTHOR
|
Mohamed Bouhamida (bhmd95(AT)yahoo.fr), Dec 21 2007
|
|
|
Search completed in 0.002 seconds
|
