Numbers n such that 245*2^n-1 is prime.

Terms

a(0) =4a(1) =6a(2) =28a(3) =76a(4) =96a(5) =124a(6) =294a(7) =396a(8) =726a(9) =868a(10) =928a(11) =1400a(12) =3056a(13) =6594a(14) =12588a(15) =15708a(16) =88576a(17) =144288a(18) =238468