Numbers k such that 6^k - 5^(k-1) is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =12a(6) =16a(7) =18a(8) =21a(9) =42a(10) =66a(11) =69a(12) =123a(13) =132a(14) =165a(15) =204a(16) =397a(17) =401a(18) =486a(19) =657a(20) =1005a(21) =1050a(22) =1882a(23) =2545a(24) =2813a(25) =3168a(26) =4092a(27) =4151a(28) =4469a(29) =5358