a(n) = p*(p - 1)*(13*p - 5)/6, where p = prime(n).

Terms

a(0) =7a(1) =34a(2) =200a(3) =602a(4) =2530a(5) =4264a(6) =9792a(7) =13794a(8) =24794a(9) =50344a(10) =61690a(11) =105672a(12) =144320a(13) =166754a(14) =218362a(15) =314184a(16) =434594a(17) =480680a(18) =638242a(19) =760410a(20) =826944a(21) =1049594a(22) =1218274a(23) =1503744a(24) =1949312a(25) =2201800a(26) =2335834a(27) =2620002a(28) =2770344a(29) =3088064