(p^2 - 1)/12 where p > 3 runs through the primes.

Terms

a(0) =2a(1) =4a(2) =10a(3) =14a(4) =24a(5) =30a(6) =44a(7) =70a(8) =80a(9) =114a(10) =140a(11) =154a(12) =184a(13) =234a(14) =290a(15) =310a(16) =374a(17) =420a(18) =444a(19) =520a(20) =574a(21) =660a(22) =784a(23) =850a(24) =884a(25) =954a(26) =990a(27) =1064a(28) =1344a(29) =1430