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

Terms

a(0) =1a(1) =2a(2) =11a(3) =24a(4) =28a(5) =92a(6) =166a(7) =191a(8) =220a(9) =587a(10) =677a(11) =964a(12) =988a(13) =1840a(14) =2664a(15) =3604a(16) =6079a(17) =6640a(18) =8817a(19) =33647a(20) =34308a(21) =39882a(22) =44055a(23) =47050a(24) =64100a(25) =103313a(26) =223439a(27) =225921