Numbers k such that 2^k - 25 is prime.

Terms

a(0) =5a(1) =7a(2) =9a(3) =13a(4) =33a(5) =37a(6) =57a(7) =63a(8) =93a(9) =127a(10) =129a(11) =165a(12) =189a(13) =369a(14) =717a(15) =3079a(16) =3087a(17) =3925a(18) =6709a(19) =7633a(20) =18001a(21) =21961a(22) =55557a(23) =60415a(24) =63589a(25) =69463a(26) =75949a(27) =98265a(28) =212295a(29) =416773