Numbers k such that 2*6^k + 1 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =10a(6) =11a(7) =17a(8) =20a(9) =28a(10) =41a(11) =48a(12) =57a(13) =58a(14) =59a(15) =71a(16) =208a(17) =972a(18) =993a(19) =1432a(20) =2001a(21) =2175a(22) =2622a(23) =3419a(24) =3720a(25) =4860a(26) =7300a(27) =7402a(28) =14988a(29) =15774