If n = Product (p_j^k_j) then a(n) = Product (p_j) + Product (k_j).

Terms

a(0) =2a(1) =3a(2) =4a(3) =4a(4) =6a(5) =7a(6) =8a(7) =5a(8) =5a(9) =11a(10) =12a(11) =8a(12) =14a(13) =15a(14) =16a(15) =6a(16) =18a(17) =8a(18) =20a(19) =12a(20) =22a(21) =23a(22) =24a(23) =9a(24) =7a(25) =27a(26) =6a(27) =16a(28) =30a(29) =31