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

Terms

a(0) =2a(1) =4a(2) =8a(3) =12a(4) =16a(5) =40a(6) =80a(7) =314a(8) =478a(9) =604a(10) =634a(11) =790a(12) =868a(13) =1264a(14) =1376a(15) =2536a(16) =3544a(17) =6564a(18) =7268a(19) =7780a(20) =8366a(21) =15010a(22) =16636a(23) =18672a(24) =27084a(25) =29954a(26) =51968a(27) =60940a(28) =67044