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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 (list; graph; refs; listen; history; text; internal format)
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: A172416 A317883 A144958 * A280246 A006490 A307856

Adjacent sequences:  A034772 A034773 A034774 * A034776 A034777 A034778

KEYWORD

nonn

AUTHOR

Erich Friedman

STATUS

approved

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Last modified November 15 21:37 EST 2019. Contains 329168 sequences. (Running on oeis4.)