Numbers k such that 2^k - 23 is prime.

Terms

a(0) =2a(1) =4a(2) =6a(3) =8a(4) =12a(5) =14a(6) =18a(7) =36a(8) =68a(9) =152a(10) =212a(11) =324a(12) =1434a(13) =1592a(14) =1668a(15) =3338a(16) =7908a(17) =9662a(18) =27968a(19) =28116a(20) =33974a(21) =41774a(22) =66804a(23) =144518a(24) =162954a(25) =241032a(26) =366218a(27) =676592a(28) =991968