Numbers n such that 57*2^n-1 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =8a(5) =10a(6) =20a(7) =22a(8) =25a(9) =26a(10) =32a(11) =44a(12) =62a(13) =77a(14) =158a(15) =317a(16) =500a(17) =713a(18) =1657a(19) =1790a(20) =2761a(21) =2794a(22) =3704a(23) =4174a(24) =6772a(25) =14348a(26) =16132a(27) =16160a(28) =16766a(29) =21097