Numbers k such that 237*2^k+1 is prime.

Terms

a(0) =4a(1) =10a(2) =52a(3) =58a(4) =59a(5) =68a(6) =82a(7) =115a(8) =247a(9) =647a(10) =2338a(11) =2627a(12) =4415a(13) =8410a(14) =17098a(15) =38434a(16) =42739a(17) =59140a(18) =100627a(19) =104372a(20) =127363a(21) =137767a(22) =173551a(23) =234082a(24) =243772a(25) =585403a(26) =1710490a(27) =4153348a(28) =5291999a(29) =5315983