Numbers k such that 2^k - 11 is prime.

Terms

a(0) =4a(1) =6a(2) =10a(3) =18a(4) =42a(5) =78a(6) =94a(7) =114a(8) =190a(9) =322a(10) =546a(11) =3894a(12) =10318a(13) =11650a(14) =12474a(15) =20994a(16) =61810a(17) =103882a(18) =296010a(19) =636930a(20) =653638a(21) =926766