Numbers k such that 423*2^k+1 is prime.

Terms

a(0) =2a(1) =5a(2) =6a(3) =8a(4) =9a(5) =12a(6) =17a(7) =24a(8) =44a(9) =48a(10) =57a(11) =68a(12) =74a(13) =125a(14) =204a(15) =272a(16) =306a(17) =345a(18) =378a(19) =488a(20) =528a(21) =678a(22) =750a(23) =974a(24) =1140a(25) =2274a(26) =2928a(27) =4532a(28) =4533a(29) =6173