Numbers k such that 275*2^k + 1 is prime.

Terms

a(0) =7a(1) =15a(2) =21a(3) =25a(4) =27a(5) =69a(6) =71a(7) =105a(8) =207a(9) =285a(10) =611a(11) =635a(12) =647a(13) =969a(14) =1127a(15) =1159a(16) =2407a(17) =2529a(18) =3517a(19) =3577a(20) =6275a(21) =6729a(22) =7919a(23) =8809a(24) =9375a(25) =27369a(26) =31657a(27) =44149a(28) =58579a(29) =59355