Numbers n such that 39*2^n-1 is a prime.

Terms

a(0) =3a(1) =24a(2) =105a(3) =153a(4) =188a(5) =605a(6) =795a(7) =813a(8) =839a(9) =2135a(10) =2619a(11) =4053a(12) =8333a(13) =15519a(14) =16025a(15) =16505a(16) =30684a(17) =40700a(18) =43683a(19) =52233a(20) =142205a(21) =222345a(22) =225333a(23) =292839a(24) =322613a(25) =747219a(26) =781220