Primes of the form 9n^2 + 4.

Terms

a(0) =13a(1) =229a(2) =733a(3) =1093a(4) =2029a(5) =3253a(6) =7573a(7) =13693a(8) =18229a(9) =21613a(10) =31333a(11) =33493a(12) =42853a(13) =59053a(14) =65029a(15) =71293a(16) =91813a(17) =127453a(18) =140629a(19) =178933a(20) =189229a(21) =199813a(22) =205213a(23) =227533a(24) =233293a(25) =245029a(26) =257053a(27) =328333a(28) =378229a(29) =439573