Numbers k such that 187*2^k-1 is prime.

Terms

a(0) =1a(1) =17a(2) =21a(3) =53a(4) =253a(5) =2173a(6) =3313a(7) =5197a(8) =5333a(9) =6929a(10) =28017a(11) =40429a(12) =47877a(13) =80617a(14) =110513a(15) =139673a(16) =141201a(17) =263093a(18) =379649a(19) =483153