Numbers k such that 2^k + 5 is prime.

Terms

a(0) =1a(1) =3a(2) =5a(3) =11a(4) =47a(5) =53a(6) =141a(7) =143a(8) =191a(9) =273a(10) =341a(11) =16541a(12) =34001a(13) =34763a(14) =42167a(15) =193965a(16) =282203