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A034771 Dirichlet convolution of d(n) (# of divisors) with b_n=2^(n-1). 0

%I

%S 1,4,6,15,18,48,66,154,267,552,1026,2154,4098,8328,16428,33061,65538,

%T 131676,262146,525390,1048716,2099208,4194306,8393124,16777251,

%U 33562632,67109392,134234334,268435458,536904864,1073741826,2147549616

%N Dirichlet convolution of d(n) (# of divisors) with b_n=2^(n-1).

%F a(n) ~ 2^(n-1). - _Vaclav Kotesovec_, Sep 11 2019

%t Table[Sum[DivisorSigma[0, n/d]*2^(d - 1), {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 October 19 03:10 EDT 2021. Contains 348073 sequences. (Running on oeis4.)