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

Terms

a(0) =2a(1) =3a(2) =4a(3) =7a(4) =9a(5) =10a(6) =16a(7) =31a(8) =45a(9) =54a(10) =64a(11) =261a(12) =304a(13) =640a(14) =1102a(15) =1141a(16) =1609a(17) =2127a(18) =2212a(19) =4845a(20) =4971a(21) =5607a(22) =9969a(23) =10851a(24) =11605a(25) =22249a(26) =43122a(27) =55252a(28) =66025a(29) =108046