Numbers k such that 337*2^k+1 is prime.

Terms

a(0) =4a(1) =6a(2) =10a(3) =26a(4) =64a(5) =66a(6) =70a(7) =102a(8) =322a(9) =370a(10) =570a(11) =1750a(12) =1782a(13) =1974a(14) =2482a(15) =6886a(16) =7782a(17) =9784a(18) =20476a(19) =34826a(20) =37546a(21) =46566a(22) =47800a(23) =132962a(24) =184230a(25) =257930a(26) =286554a(27) =370274a(28) =544852a(29) =648856