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

Terms

a(0) =0a(1) =6a(2) =15a(3) =6a(4) =55a(5) =21a(6) =119a(7) =6a(8) =15a(9) =61a(10) =341a(11) =21a(12) =533a(13) =125a(14) =70a(15) =6a(16) =1003a(17) =21a(18) =1273a(19) =61a(20) =134a(21) =347a(22) =1909a(23) =21a(24) =55a(25) =539a(26) =15a(27) =125a(28) =3161a(29) =76