A302134 Numbers k such that 9*k^k - 8 is prime.

7, 9, 11, 353, 7133

Offset: 1

Author

Seiichi Manyama, Apr 02 2018

Keywords

• nonn
• more

Comments

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

Crossrefs

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).

Programs

PARI

isok(k) = ispseudoprime(9*k^k - 8); \\ Altug Alkan, Apr 02 2018

Extensions

a(5) from Michael S. Branicky, Apr 15 2023