Numbers k such that 2^4 * 3^k - 1 is prime.

Terms

a(0) =1a(1) =3a(2) =9a(3) =13a(4) =31a(5) =43a(6) =81a(7) =121a(8) =235a(9) =1135a(10) =1245a(11) =1521a(12) =2019a(13) =2329a(14) =3573a(15) =11245a(16) =15571a(17) =37333a(18) =54471a(19) =70641