Numbers k such that 277*2^k-1 is prime.

Terms

a(0) =5a(1) =21a(2) =101a(3) =105a(4) =333a(5) =461a(6) =933a(7) =1041a(8) =2157a(9) =3321a(10) =5177a(11) =5513a(12) =5781a(13) =9737a(14) =11505a(15) =16457a(16) =17357a(17) =490805