Numbers k such that 2*(3^k-k)-1 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =11a(4) =30a(5) =62a(6) =534a(7) =620a(8) =803a(9) =2436a(10) =2669a(11) =3975a(12) =4530a(13) =4827a(14) =5294a(15) =15987a(16) =17589a(17) =51960