a(n) = (prime(n)^4 - prime(n)^2)/12.

Terms

a(0) =1a(1) =6a(2) =50a(3) =196a(4) =1210a(5) =2366a(6) =6936a(7) =10830a(8) =23276a(9) =58870a(10) =76880a(11) =156066a(12) =235340a(13) =284746a(14) =406456a(15) =657306a(16) =1009490a(17) =1153510a(18) =1678886a(19) =2117220a(20) =2366076a(21) =3245320a(22) =3954286a(23) =5227860a(24) =7376656a(25) =8670850a(26) =9378356a(27) =10922346a(28) =11762190a(29) =13586216