Numbers n such that 205*2^n-1 is prime.

Terms

a(0) =1a(1) =9a(2) =39a(3) =45a(4) =49a(5) =67a(6) =75a(7) =99a(8) =129a(9) =159a(10) =177a(11) =445a(12) =721a(13) =771a(14) =829a(15) =849a(16) =865a(17) =1971a(18) =3045a(19) =8397a(20) =9019a(21) =10749a(22) =21037a(23) =30529a(24) =38349a(25) =46257a(26) =53577a(27) =64695a(28) =77451a(29) =128019