Numbers k such that 11*2^k - 1 is prime.

Terms

a(0) =2a(1) =26a(2) =50a(3) =54a(4) =126a(5) =134a(6) =246a(7) =354a(8) =362a(9) =950a(10) =1310a(11) =2498a(12) =6926a(13) =11826a(14) =31734a(15) =67850a(16) =74726a(17) =96150a(18) =374114a(19) =696438a(20) =743322a(21) =1044086a(22) =1104606a(23) =1261478