Numbers n such that 69*2^n-1 is prime.

Terms

a(0) =1a(1) =4a(2) =5a(3) =7a(4) =9a(5) =11a(6) =13a(7) =17a(8) =19a(9) =23a(10) =29a(11) =37a(12) =49a(13) =61a(14) =79a(15) =99a(16) =121a(17) =133a(18) =141a(19) =164a(20) =173a(21) =181a(22) =185a(23) =193a(24) =233a(25) =299a(26) =313a(27) =351a(28) =377a(29) =540