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

Terms

a(0) =0a(1) =5a(2) =28a(3) =21a(4) =3126a(5) =302a(6) =823544a(7) =85a(8) =757a(9) =103288a(10) =285311670612a(11) =2254a(13) =106237426a(14) =766272a(15) =341a(17) =7268a(19) =3304728a(20) =1801923904a(23) =17230a(24) =9768751