a(n) = Sum_{d|n} Sum_{p|n, p prime} p^d.

Terms

a(0) =0a(1) =6a(2) =30a(3) =22a(4) =3130a(5) =846a(6) =823550a(7) =278a(8) =19713a(9) =9769842a(10) =285311670622a(11) =536480a(13) =678223912966a(14) =30531930560a(15) =65814a(17) =387703674