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

Terms

a(0) =2a(1) =8a(2) =17a(3) =36a(4) =57a(5) =101a(6) =121a(7) =188a(8) =224a(9) =353a(10) =343a(11) =573a(12) =535a(13) =729a(14) =777a(15) =1036a(16) =1005a(17) =1406a(18) =1275a(19) =1801a(20) =1669a(21) =2087a(22) =1911a(23) =2861a(24) =2482a(25) =3167a(26) =3005a(27) =3753a(28) =3163a(29) =4541