a(n) = n^2 * Sum_{primes p dividing n} (1 + 1/p^2).

Terms

a(0) =0a(1) =5a(2) =10a(3) =20a(4) =26a(5) =85a(6) =50a(7) =80a(8) =90a(9) =229a(10) =122a(11) =340a(12) =170a(13) =445a(14) =484a(15) =320a(16) =290a(17) =765a(18) =362a(19) =916a(20) =940a(21) =1093a(22) =530a(23) =1360a(24) =650a(25) =1525a(26) =810a(27) =1780a(28) =842a(29) =3061