a(n) = (prime(n)^4 - prime(n)^2)/6.

Terms

a(0) =2a(1) =12a(2) =100a(3) =392a(4) =2420a(5) =4732a(6) =13872a(7) =21660a(8) =46552a(9) =117740a(10) =153760a(11) =312132a(12) =470680a(13) =569492a(14) =812912a(15) =1314612a(16) =2018980a(17) =2307020a(18) =3357772a(19) =4234440a(20) =4732152a(21) =6490640a(22) =7908572a(23) =10455720a(24) =14753312a(25) =17341700a(26) =18756712a(27) =21844692a(28) =23524380a(29) =27172432