a(n) = (prime(n)^6 - 1)/504.

Terms

a(0) =3515a(1) =9577a(2) =47892a(3) =93345a(4) =293722a(5) =1180205a(6) =1760920a(7) =5090727a(8) =9424810a(9) =12542387a(10) =21387332a(11) =43976907a(12) =83691535a(13) =102222965a(14) =179480917a(15) =254167230a(16) =300266322a(17) =482316380a(18) =648691217a(19) =986073990a(20) =1652722232a(21) =2106190775a(22) =2369151382a(23) =2977639587a(24) =3327579585a(25) =4130856652