Numbers k such that 189*2^k-1 is prime.

Terms

a(0) =3a(1) =4a(2) =5a(3) =8a(4) =11a(5) =12a(6) =24a(7) =33a(8) =44a(9) =48a(10) =56a(11) =76a(12) =93a(13) =108a(14) =172a(15) =216a(16) =304a(17) =363a(18) =401a(19) =420a(20) =500a(21) =545a(22) =581a(23) =756a(24) =875a(25) =1552a(26) =1931a(27) =2740a(28) =2787a(29) =2825