Numbers k such that 431*2^k+1 is prime.

Terms

a(0) =1a(1) =3a(2) =9a(3) =15a(4) =23a(5) =45a(6) =47a(7) =95a(8) =225a(9) =309a(10) =363a(11) =923a(12) =1425a(13) =1473a(14) =1667a(15) =2073a(16) =2099a(17) =2483a(18) =2575a(19) =3183a(20) =4483a(21) =5807a(22) =6537a(23) =10761a(24) =18217a(25) =18847a(26) =27357a(27) =36847a(28) =53527a(29) =67645