login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A034770 Dirichlet convolution of Bell numbers with themselves. 0

%I

%S 1,2,4,11,30,108,406,1764,8284,42324,231950,1357264,8427194,55289280,

%T 381798704,2765918869,20960284294,165729748096,1364153612318,

%U 11665484452558,103448316471556,949739632545452,9013431476894646

%N Dirichlet convolution of Bell numbers with themselves.

%t Table[Sum[BellB[n/d - 1]*BellB[d - 1], {d, Divisors[n]}], {n, 1, 25}] (* _Vaclav Kotesovec_, Sep 10 2019 *)

%K nonn

%O 1,2

%A _Erich Friedman_

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 16 21:28 EDT 2021. Contains 347473 sequences. (Running on oeis4.)