Dirichlet convolution of b_n=2^(n-1) with sigma(n).

Terms

a(0) =1a(1) =5a(2) =8a(3) =21a(4) =22a(5) =64a(6) =72a(7) =181a(8) =285a(9) =590a(10) =1036a(11) =2256a(12) =4110a(13) =8424a(14) =16496a(15) =33269a(16) =65554a(17) =132081a(18) =262164a(19) =526062a(20) =1048896a(21) =2100284a(22) =4194328a(23) =8395760a(24) =16777343a(25) =33566790a(26) =67109980a(27) =134242920a(28) =268435486a(29) =536922688