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%I #5 Sep 10 2019 12:31:54
%S 1,3,6,15,31,92,267,1023,4404,21705,116999,680790,4217693,27653099,
%T 190915798,1382993235,10480207683,82865009684,682077068303,
%U 5832742772351,51724159284888,474869818486877,4506715742641627
%N Dirichlet convolution of b_n=2^(n-1) with Bell numbers.
%t Table[Sum[BellB[n/d - 1]*2^(d - 1), {d, Divisors[n]}], {n, 1, 25}] (* _Vaclav Kotesovec_, Sep 10 2019 *)
%K nonn
%O 1,2
%A _Erich Friedman_
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