Numbers k such that 2^k + 9 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =6a(5) =7a(6) =9a(7) =10a(8) =18a(9) =23a(10) =30a(11) =37a(12) =47a(13) =57a(14) =66a(15) =82a(16) =95a(17) =119a(18) =175a(19) =263a(20) =295a(21) =317a(22) =319a(23) =327a(24) =670a(25) =697a(26) =886a(27) =1342a(28) =1717a(29) =1855