A034775 Dirichlet convolution of d(n) (# of divisors) with Bell numbers.

1, 3, 4, 10, 17, 62, 205, 894, 4147, 21183, 115977, 678700, 4213599, 27644849, 190899360, 1382960323, 10480142149, 82864878205, 682076806161, 5832742247416, 51724158235786, 474869816388707, 4506715738447325

Offset

1,2

Links

Table of n, a(n) for n=1..23.

Mathematica

Table[Sum[BellB[n/d - 1]*DivisorSigma[0, d], {d, Divisors[n]}], {n, 1, 25}] (* Vaclav Kotesovec, Sep 10 2019 *)

Crossrefs

Sequence in context: A317883 A337089 A144958 * A280246 A338012 A350042

Adjacent sequences: A034772 A034773 A034774 * A034776 A034777 A034778

Keyword

nonn

Author

Erich Friedman

Status

approved