Numbers k such that 181*2^k-1 is prime.

Terms

a(0) =3a(1) =5a(2) =7a(3) =9a(4) =11a(5) =17a(6) =23a(7) =31a(8) =35a(9) =43a(10) =47a(11) =83a(12) =85a(13) =99a(14) =101a(15) =195a(16) =267a(17) =281a(18) =363a(19) =391a(20) =519a(21) =623a(22) =653a(23) =673a(24) =701a(25) =1091a(26) =1147a(27) =1565a(28) =3273a(29) =3661