Primes of form k^2 + 4.

Terms

a(0) =5a(1) =13a(2) =29a(3) =53a(4) =173a(5) =229a(6) =293a(7) =733a(8) =1093a(9) =1229a(10) =1373a(11) =2029a(12) =2213a(13) =3253a(14) =4229a(15) =4493a(16) =5333a(17) =7229a(18) =7573a(19) =9029a(20) =9413a(21) =10613a(22) =13229a(23) =13693a(24) =15629a(25) =18229a(26) =18773a(27) =21613a(28) =24029a(29) =26573