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

Terms

a(0) =0a(1) =1a(2) =3a(3) =7a(4) =9a(5) =19a(6) =27a(7) =33a(8) =147a(9) =639a(10) =12243a(11) =41427a(12) =44287a(13) =44449