Numbers k such that 3*6^k + 1 is prime.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =7a(5) =8a(6) =11a(7) =15a(8) =26a(9) =29a(10) =50a(11) =66a(12) =122a(13) =225a(14) =272a(15) =275a(16) =308a(17) =390a(18) =992a(19) =1201a(20) =2520a(21) =15812a(22) =17419a(23) =29328a(24) =41852