a(n) = Sum_{d|n} d^omega(d).

Terms

a(0) =1a(1) =3a(2) =4a(3) =7a(4) =6a(5) =42a(6) =8a(7) =15a(8) =13a(9) =108a(10) =12a(11) =190a(12) =14a(13) =206a(14) =234a(15) =31a(16) =18a(17) =375a(18) =20a(19) =512a(20) =452a(21) =498a(22) =24a(23) =774a(24) =31a(25) =692a(26) =40a(27) =994a(28) =30a(29) =27372