Numbers k such that 4^k - 3 is prime.

Terms

a(0) =2a(1) =3a(2) =5a(3) =6a(4) =7a(5) =10a(6) =11a(7) =12a(8) =47a(9) =58a(10) =61a(11) =75a(12) =87a(13) =133a(14) =168a(15) =226a(16) =347a(17) =425a(18) =868a(19) =1977a(20) =2815a(21) =3378a(22) =4385a(23) =5286a(24) =7057a(25) =7200a(26) =8230a(27) =8340a(28) =13175a(29) =17226