Numbers n such that 7^n-6^(n-1) is prime.

Terms

a(0) =2a(1) =3a(2) =5a(3) =6a(4) =7a(5) =11a(6) =17a(7) =18a(8) =54a(9) =509a(10) =529a(11) =2526a(12) =3042a(13) =3421a(14) =4485a(15) =13127a(16) =17602a(17) =23825a(18) =27381