Numbers n such that 91*2^n-1 is prime.

Terms

a(0) =1a(1) =3a(2) =9a(3) =13a(4) =15a(5) =17a(6) =19a(7) =23a(8) =47a(9) =57a(10) =67a(11) =73a(12) =77a(13) =81a(14) =83a(15) =191a(16) =301a(17) =321a(18) =435a(19) =867a(20) =869a(21) =917a(22) =6009a(23) =6051a(24) =8077a(25) =9003a(26) =10355a(27) =10719a(28) =11217a(29) =20197