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

Terms

a(0) =1a(1) =2a(2) =6a(3) =7a(4) =11a(5) =23a(6) =33a(7) =48a(8) =68a(9) =79a(10) =116a(11) =151a(12) =205a(13) =1016a(14) =1332a(15) =1448a(16) =3481a(17) =3566a(18) =3665a(19) =11233a(20) =13363a(21) =29166a(22) =44358a(23) =58530a(24) =191706a(25) =386450a(26) =605168a(27) =616879a(28) =1204077