Numbers k such that 9^k + 2 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =5a(5) =7a(6) =12a(7) =13a(8) =18a(9) =49a(10) =55a(11) =63a(12) =193a(13) =247a(14) =610a(15) =929a(16) =2173a(17) =3479a(18) =5494a(19) =11158a(20) =16754a(21) =30920a(22) =47752a(23) =50702a(24) =53725a(25) =68122a(26) =89214a(27) =180804