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 A277628 Positive integers n such that 3^n == 6 (mod n). 3
 1, 3, 21, 936340943, 10460353197, 9374251222371, 23326283250291, 615790788171551 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS No other terms below 10^15. - Max Alekseyev, Sep 12 2017 LINKS PROG (PARI) isok(n) = Mod(3, n)^n == Mod(6, n); CROSSREFS Solutions to 3^n == k (mod n): A277340 (k=-11), A277289 (k=-7), A277288 (k=-5), A015973 (k=-2), A015949 (k=-1), A067945 (k=1), A276671 (k=2), A276740 (k=5), this sequence (k=6), A277126 (k=7), A277630 (k=8), A277274 (k=11). Sequence in context: A054739 A117508 A001139 * A016449 A161377 A122495 Adjacent sequences:  A277625 A277626 A277627 * A277629 A277630 A277631 KEYWORD nonn,more AUTHOR Dmitry Ezhov, Oct 24 2016 EXTENSIONS a(6)-a(8) from Max Alekseyev, Sep 12 2017 STATUS approved

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Last modified February 17 18:46 EST 2019. Contains 320222 sequences. (Running on oeis4.)