%I

%S 7,9,11,353

%N Numbers k such that 9*k^k - 8 is prime.

%C 9*353^353 - 8 is a probable prime.

%o (PARI) isok(k) = ispseudoprime(9*k^k - 8); \\ _Altug Alkan_, Apr 02 2018

%Y Numbers k such that b*k^k - b + 1 is prime: A110931 (b=2), A302132 (b=3), A301521 (b=4), A302123 (b=6), A302133 (b=8), this sequence (b=9), A302136 (b=10).

%K nonn,more

%O 1,1

%A _Seiichi Manyama_, Apr 02 2018