Numbers k such that 4^k-3^(k+1) is prime.

Terms

a(0) =4a(1) =8a(2) =24a(3) =36a(4) =48a(5) =246a(6) =608a(7) =734a(8) =774a(9) =824a(10) =948a(11) =1244a(12) =3230a(13) =4656a(14) =5448a(15) =6360a(16) =7598a(17) =15390a(18) =48158a(19) =86754