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 A268660 Numbers n such that 3*2^n + 1 is a prime factor of a generalized Fermat number 12^(2^m) + 1 for some m. 10
 2, 5, 8, 41, 209, 353, 2816, 20909, 42665, 157169, 213321, 303093, 362765, 382449, 2145353, 2478785 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES Wilfrid Keller, private communication, 2008. LINKS Table of n, a(n) for n=1..16. Anders Björn and Hans Riesel, Factors of generalized Fermat numbers, Math. Comp. 67 (1998), no. 221, pp. 441-446. Anders Björn and Hans Riesel, Table errata to “Factors of generalized Fermat numbers”, Math. Comp. 74 (2005), no. 252, p. 2099. Anders Björn and Hans Riesel, Table errata 2 to "Factors of generalized Fermat numbers", Math. Comp. 80 (2011), pp. 1865-1866. C. K. Caldwell, Top Twenty page, Generalized Fermat Divisors (base=12) OEIS Wiki, Generalized Fermat numbers CROSSREFS Cf. A152585, A268657, A268658, A204620, A268659, A268661, A268662, A268663, A226366, A268664. Subsequence of A002253. Sequence in context: A120342 A214842 A299517 * A180627 A264860 A061354 Adjacent sequences: A268657 A268658 A268659 * A268661 A268662 A268663 KEYWORD nonn,hard,more AUTHOR Arkadiusz Wesolowski, Feb 10 2016 STATUS approved

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Last modified June 17 23:09 EDT 2024. Contains 373468 sequences. (Running on oeis4.)