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A034775
Dirichlet convolution of d(n) (# of divisors) with Bell numbers.
0
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
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
KEYWORD
nonn
STATUS
approved