Numbers k such that 201*2^k+1 is prime.

Terms

a(0) =3a(1) =4a(2) =9a(3) =60a(4) =72a(5) =75a(6) =84a(7) =348a(8) =592a(9) =1348a(10) =1380a(11) =1632a(12) =1855a(13) =2335a(14) =4528a(15) =9813a(16) =17103a(17) =28935a(18) =34023a(19) =100459a(20) =243544a(21) =281865a(22) =371844a(23) =648792a(24) =812035a(25) =886480a(26) =2080464a(27) =4146003