Sum of cubes of primes dividing n.

Terms

a(0) =0a(1) =8a(2) =27a(3) =8a(4) =125a(5) =35a(6) =343a(7) =8a(8) =27a(9) =133a(10) =1331a(11) =35a(12) =2197a(13) =351a(14) =152a(15) =8a(16) =4913a(17) =35a(18) =6859a(19) =133a(20) =370a(21) =1339a(22) =12167a(23) =35a(24) =125a(25) =2205a(26) =27a(27) =351a(28) =24389a(29) =160