Numbers n such that 211*2^n-1 is prime.

Terms

a(0) =1a(1) =13a(2) =23a(3) =37a(4) =43a(5) =67a(6) =83a(7) =151a(8) =661a(9) =811a(10) =3937a(11) =5027a(12) =5365a(13) =9307a(14) =11971a(15) =60295a(16) =89071a(17) =89303a(18) =262877