Sum of cubes of odd primes dividing n.

Terms

a(0) =0a(1) =0a(2) =27a(3) =0a(4) =125a(5) =27a(6) =343a(7) =0a(8) =27a(9) =125a(10) =1331a(11) =27a(12) =2197a(13) =343a(14) =152a(15) =0a(16) =4913a(17) =27a(18) =6859a(19) =125a(20) =370a(21) =1331a(22) =12167a(23) =27a(24) =125a(25) =2197a(26) =27a(27) =343a(28) =24389a(29) =152