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A302133
Numbers k such that 8*k^k - 7 is prime.
3
10, 800, 1266, 1395
OFFSET
1,1
COMMENTS
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
PROG
(PARI) isok(k) = ispseudoprime(8*k^k - 7); \\ Altug Alkan, Apr 02 2018
CROSSREFS
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).
Sequence in context: A242373 A221045 A015057 * A322918 A233170 A211913
KEYWORD
nonn,more
AUTHOR
Seiichi Manyama, Apr 02 2018
STATUS
approved