a(n) = (prime(n)^4 - prime(n)^2)/3.

Terms

a(0) =4a(1) =24a(2) =200a(3) =784a(4) =4840a(5) =9464a(6) =27744a(7) =43320a(8) =93104a(9) =235480a(10) =307520a(11) =624264a(12) =941360a(13) =1138984a(14) =1625824a(15) =2629224a(16) =4037960a(17) =4614040a(18) =6715544a(19) =8468880a(20) =9464304a(21) =12981280a(22) =15817144a(23) =20911440a(24) =29506624a(25) =34683400a(26) =37513424a(27) =43689384