a(n) = sum of the divisors of the product of the divisors of n.

Terms

a(0) =1a(1) =3a(2) =4a(3) =15a(4) =6a(5) =91a(6) =8a(7) =127a(8) =40a(9) =217a(10) =12a(11) =5080a(12) =14a(13) =399a(14) =403a(15) =2047a(16) =18a(17) =16395a(18) =20a(19) =19812a(20) =741a(21) =931a(22) =24a(23) =991111a(24) =156a(25) =1281a(26) =1093a(27) =50800a(28) =30a(29) =2929531