Primes of the form (k^2+4)/5.

Terms

a(0) =17a(1) =73a(2) =89a(3) =193a(4) =337a(5) =521a(6) =953a(7) =1009a(8) =1249a(9) =1657a(10) =2377a(11) =2833a(12) =3329a(13) =3433a(14) =4441a(15) =4561a(16) =5849a(17) =6553a(18) =7297a(19) =8081a(20) =8737a(21) =9769a(22) =11617a(23) =12401a(24) =12601a(25) =13417a(26) =15569a(27) =16937a(28) =17881a(29) =18121