A302132 -id:A302132 - cp's OEIS frontend

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

7, 9, 11, 353, 7133

Offset: 1

Seiichi Manyama, Apr 02 2018

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

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).

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

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

A302136 Numbers k such that 10*k^k - 9 is prime.

Original entry on oeis.org

2, 4, 14, 80, 1133, 4120

Offset: 1

Seiichi Manyama, Apr 02 2018

10*1133^1133 - 9 is a probable prime.
a(6) > 3000. - Tyler NeSmith, May 15 2021
a(7) > 20000. - Michael S. Branicky, Nov 29 2024

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), A302134 (b=9), this sequence (b=10).

Cf. A302137.

isok(k) = ispseudoprime(10*k^k - 9); \\ Altug Alkan, Apr 02 2018

a(6) from Michael S. Branicky, Mar 28 2023

A302133 Numbers k such that 8*k^k - 7 is prime.

Original entry on oeis.org

10, 800, 1266, 1395

Offset: 1

Seiichi Manyama, Apr 02 2018

The terms greater than or equal to 800 correspond to probable primes.
a(5) > 4000. - Tyler NeSmith, May 13 2021
a(5) > 20000. - Michael S. Branicky, Sep 02 2024

Numbers k such that b*k^k - b + 1 is prime: A110931 (b=2), A302132 (b=3), A301521 (b=4), A302123 (b=6), this sequence (b=8), A302134 (b=9), A302136 (b=10).

isok(k) = ispseudoprime(8*k^k - 7); \\ Altug Alkan, Apr 02 2018

cp's OEIS Frontend

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

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A302136 Numbers k such that 10*k^k - 9 is prime.

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A302133 Numbers k such that 8*k^k - 7 is prime.

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