Numbers k such that 243*2^k+1 is prime.

Terms

a(0) =1a(1) =4a(2) =12a(3) =13a(4) =18a(5) =24a(6) =49a(7) =64a(8) =78a(9) =144a(10) =148a(11) =204a(12) =258a(13) =453a(14) =796a(15) =1309a(16) =1612a(17) =1812a(18) =3873a(19) =4348a(20) =6354a(21) =7996a(22) =8536a(23) =10128a(24) =11289a(25) =29544a(26) =32773a(27) =123114a(28) =130998a(29) =153417