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 A302136 Numbers k such that 10*k^k - 9 is prime. 4
 2, 4, 14, 80, 1133, 4120 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 10*1133^1133 - 9 is a probable prime. a(6) > 3000. - Tyler NeSmith, May 15 2021 LINKS Table of n, a(n) for n=1..6. PROG (PARI) isok(k) = ispseudoprime(10*k^k - 9); \\ 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), A302133 (b=8), A302134 (b=9), this sequence (b=10). Cf. A302137. Sequence in context: A340909 A052856 A093462 * A371674 A181080 A166894 Adjacent sequences: A302133 A302134 A302135 * A302137 A302138 A302139 KEYWORD nonn,more AUTHOR Seiichi Manyama, Apr 02 2018 EXTENSIONS a(6) from Michael S. Branicky, Mar 28 2023 STATUS approved

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Last modified June 23 18:37 EDT 2024. Contains 373653 sequences. (Running on oeis4.)