login
A034737
Dirichlet convolution of b_n=2^(n-1) with sigma(n).
0
1, 5, 8, 21, 22, 64, 72, 181, 285, 590, 1036, 2256, 4110, 8424, 16496, 33269, 65554, 132081, 262164, 526062, 1048896, 2100284, 4194328, 8395760, 16777343, 33566790, 67109980, 134242920, 268435486, 536922688, 1073741856, 2147583093
OFFSET
1,2
FORMULA
a(n) ~ 2^(n-1). - Vaclav Kotesovec, Sep 11 2019
MATHEMATICA
Table[Sum[DivisorSigma[1, n/d]*2^(d - 1), {d, Divisors[n]}], {n, 1, 40}] (* Vaclav Kotesovec, Sep 10 2019 *)
CROSSREFS
Sequence in context: A271693 A271281 A246330 * A271156 A272115 A268195
KEYWORD
nonn
STATUS
approved