|
Search: id:A155866
|
|
| |
|
| 1, 2, 6, 22, 91, 413, 2032, 10754, 60832, 365815, 2327835, 15612872, 109992442, 811500784, 6253327841, 50211976959, 419239644142, 3632891419054, 32616077413970, 302915722319509, 2906047810600157, 28761123170398258
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Image of Bell numbers under Riordan array (1/(1-x),x/(1-x)^2).
|
|
FORMULA
|
G.f.: 1/(1-x-x/(1-x-x/(1-x-x/(1-x-2x/(1-x-x/(1-x-3x/(1-x-x/(1-x-4x/(1-.... (continued fraction);
a(n)=sum{k=0..n, C(n+k,2k)*A000110(k)}.
a(n)=sum{k=0..n, A085478(n,k)*A000110(k)}. [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Jan 31 2009]
|
|
CROSSREFS
|
Sequence in context: A150272 A124293 A107591 this_sequence A150273 A001181 A130579
Adjacent sequences: A155863 A155864 A155865 this_sequence A155867 A155868 A155869
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Paul Barry (pbarry(AT)wit.ie), Jan 29 2009
|
|
|
Search completed in 0.002 seconds
|
