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 A242770 Composite numbers of the form A242490(n) - 1. 1
 4189, 12193, 641941, 8778073, 26822599, 11488195489 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(7) (if it exists) = A242490(k) - 1, k >= 5 * 10^7. - Hiroaki Yamanouchi, Sep 22 2014 LINKS EXAMPLE a(1) = A242490(16) - 1 = 4189 = 59 * 71; a(2) = A242490(21) - 1 = 12193 = 89 * 137; a(3) = A242490(125) - 1 = 641941 = 727 * 883; a(4) = A242490(417) - 1 = 8778073 = 2927 * 2999; a(5) = A242490(675) - 1 = 26822599 = 5081 * 5279; a(6) = A242490(10171) - 1 = 11488195489 = 107183 * 107183. CROSSREFS Cf. A242489, A242490, A242716. Sequence in context: A290846 A236805 A202530 * A234723 A152511 A252316 Adjacent sequences:  A242767 A242768 A242769 * A242771 A242772 A242773 KEYWORD nonn,more AUTHOR Vladimir Shevelev and Peter J. C. Moses, May 22 2014 EXTENSIONS a(6) from Hiroaki Yamanouchi, Sep 22 2014 STATUS approved

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Last modified August 16 05:55 EDT 2022. Contains 356160 sequences. (Running on oeis4.)