Numerator of sum of -3rd powers of divisors of n.

Terms

a(0) =1a(1) =9a(2) =28a(3) =73a(4) =126a(5) =7a(6) =344a(7) =585a(8) =757a(9) =567a(10) =1332a(11) =511a(12) =2198a(13) =387a(14) =392a(15) =4681a(16) =4914a(17) =757a(18) =6860a(19) =4599a(20) =1376a(21) =2997a(22) =12168a(23) =455a(24) =15751a(25) =9891a(26) =20440a(27) =3139a(28) =24390a(29) =147