a(n) = (prime(n+2)^2 - 1)/3.

Terms

a(0) =8a(1) =16a(2) =40a(3) =56a(4) =96a(5) =120a(6) =176a(7) =280a(8) =320a(9) =456a(10) =560a(11) =616a(12) =736a(13) =936a(14) =1160a(15) =1240a(16) =1496a(17) =1680a(18) =1776a(19) =2080a(20) =2296a(21) =2640a(22) =3136a(23) =3400a(24) =3536a(25) =3816a(26) =3960a(27) =4256a(28) =5376a(29) =5720