Numbers k such that 153*2^k-1 is prime.

Terms

a(0) =3a(1) =4a(2) =6a(3) =7a(4) =10a(5) =11a(6) =12a(7) =19a(8) =20a(9) =22a(10) =23a(11) =39a(12) =66a(13) =106a(14) =120a(15) =124a(16) =151a(17) =312a(18) =411a(19) =447a(20) =474a(21) =507a(22) =574a(23) =671a(24) =787a(25) =826a(26) =979a(27) =1690a(28) =1954a(29) =2047