Numbers k such that 2^k + 7 is prime.

Terms

a(0) =2a(1) =4a(2) =6a(3) =8a(4) =10a(5) =16a(6) =18a(7) =20a(8) =28a(9) =30a(10) =38a(11) =44a(12) =78a(13) =88a(14) =98a(15) =126a(16) =160a(17) =174a(18) =204a(19) =214a(20) =588a(21) =610a(22) =798a(23) =926a(24) =1190a(25) =1198a(26) =1806a(27) =1888a(28) =2648a(29) =3454