Numbers k such that 201*2^k-1 is prime.

Terms

a(0) =1a(1) =3a(2) =9a(3) =10a(4) =14a(5) =17a(6) =21a(7) =37a(8) =57a(9) =66a(10) =70a(11) =87a(12) =94a(13) =99a(14) =123a(15) =141a(16) =147a(17) =183a(18) =207a(19) =246a(20) =269a(21) =291a(22) =313a(23) =341a(24) =361a(25) =363a(26) =615a(27) =743a(28) =1318a(29) =1515