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

Terms

a(0) =0a(1) =6a(2) =30a(3) =36a(4) =3130a(5) =528a(6) =823550a(7) =200a(8) =1467a(9) =200240a(10) =285311670622a(11) =5820a(13) =210827456a(14) =1525560a(15) =1040a(17) =24390a(19) =9601700a(20) =3602195688a(23) =58896a(24) =19531275