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A034765 Dirichlet convolution of sigma(n) with Bell numbers. 2

%I #5 Sep 10 2019 12:14:03

%S 1,4,6,15,21,74,211,914,4161,21216,115987,678800,4213611,27645078,

%T 190899418,1382961257,10480142165,82864882508,682076806179,

%U 5832742268693,51724158236232,474869816504724,4506715738447347

%N Dirichlet convolution of sigma(n) with Bell numbers.

%t Table[Sum[BellB[n/d - 1]*DivisorSigma[1, d], {d, Divisors[n]}], {n, 1, 30}] (* _Vaclav Kotesovec_, Sep 10 2019 *)

%K nonn

%O 1,2

%A _Erich Friedman_

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Last modified April 16 19:21 EDT 2024. Contains 371754 sequences. (Running on oeis4.)