Numbers k such that 36^k - 6^k - 1 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =24a(5) =63a(6) =81a(7) =92a(8) =165a(9) =232a(10) =236a(11) =591a(12) =669a(13) =1343a(14) =2973a(15) =3630a(16) =5600a(17) =7019a(18) =17169a(19) =31945a(20) =52172