Numbers k such that 199*2^k-1 is prime.

Terms

a(0) =1a(1) =5a(2) =7a(3) =15a(4) =19a(5) =23a(6) =25a(7) =27a(8) =43a(9) =65a(10) =99a(11) =125a(12) =141a(13) =165a(14) =201a(15) =211a(16) =331a(17) =369a(18) =389a(19) =445a(20) =461a(21) =463a(22) =467a(23) =513a(24) =583a(25) =835a(26) =1071a(27) =1085a(28) =1107a(29) =1187