Integers k such that 2047*2^k - 1 is prime.

Terms

a(0) =1a(1) =9a(2) =13a(3) =77a(4) =157a(5) =201a(6) =801a(7) =829a(8) =1029a(9) =1529a(10) =1573a(11) =1889a(12) =4613a(13) =20689a(14) =21013a(15) =32801a(16) =44681a(17) =81321a(18) =170513a(19) =189589