Primes of the form 2^n - 69.

Terms

a(0) =59a(1) =443a(2) =1979a(3) =4027a(4) =8123a(5) =524219a(6) =1048507a(7) =2097083a(8) =8388539a(9) =2147483579a(10) =34359738299a(11) =137438953403