A302132 Numbers k such that 3*k^k - 2 is prime.

3, 1571, 2601

Offset: 1

Author

Seiichi Manyama, Apr 02 2018

Keywords

• nonn
• more

Comments

The terms greater than or equal to 1571 correspond to probable primes.

a(4) > 25000, if it exists. - Michael S. Branicky, Sep 02 2024

Crossrefs

Numbers k such that b*k^k - b + 1 is prime: A110931 (b=2), this sequence (b=3), A301521 (b=4), A302123 (b=6), A302133 (b=8), A302134 (b=9), A302136 (b=10).

Programs

PARI

isok(k) = ispseudoprime(3*k^k - 2); \\ Altug Alkan, Apr 02 2018