|
Search: id:A052880
|
|
|
| A052880 |
|
E.g.f.: -LambertW(-exp(x)+1)/(exp(x)-1). |
|
+0
3
|
|
| 1, 1, 4, 26, 243, 2992, 45906, 845287, 18182926, 447797646, 12429760889, 384055045002, 13075708703910, 486430792977001, 19632714343389296, 854503410602781782, 39898063449977239323, 1989371798838577172796
(list; graph; listen)
|
|
|
OFFSET
|
0,3
|
|
|
COMMENT
|
A simple grammar.
|
|
LINKS
|
Alois P. Heinz, Table of n, a(n) for n = 0..100
INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 851
|
|
FORMULA
|
a(n) = Sum_{k=0..n} Stirling2(n, k)*(k+1)^(k-1). - Vladeta Jovovic (vladeta(AT)eunet.rs), Nov 12 2003
|
|
MAPLE
|
spec := [S, {B=Set(Z, 1 <= card), S=Set(C), C=Prod(B, S)}, labeled]: seq(combstruct[count](spec, size=n), n=0..20);
|
|
CROSSREFS
|
Row sums of A135313. [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Jun 01 2009]
Sequence in context: A001863 A115416 A052577 this_sequence A090357 A056786 A006056
Adjacent sequences: A052877 A052878 A052879 this_sequence A052881 A052882 A052883
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
encyclopedia(AT)pommard.inria.fr, Jan 25 2000
|
|
|
Search completed in 0.002 seconds
|
