p^2 + 2 where p is a prime.

Terms

a(0) =6a(1) =11a(2) =27a(3) =51a(4) =123a(5) =171a(6) =291a(7) =363a(8) =531a(9) =843a(10) =963a(11) =1371a(12) =1683a(13) =1851a(14) =2211a(15) =2811a(16) =3483a(17) =3723a(18) =4491a(19) =5043a(20) =5331a(21) =6243a(22) =6891a(23) =7923a(24) =9411a(25) =10203a(26) =10611a(27) =11451a(28) =11883a(29) =12771