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 A244958 Smallest positive multiple of n whose base-7 representation contains only 0's and 1's. 2
 1, 8, 57, 8, 50, 19608, 7, 8, 351, 50, 2409, 19608, 351, 56, 2745, 400, 16864, 134856, 57, 400, 399, 2794, 17158, 19608, 50, 19552, 351, 56, 137257, 120450, 16864, 2752, 2409, 16864, 350, 134856, 117993, 19608, 351, 400, 134849, 137256, 344, 16808, 2745 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 Ed Pegg Jr., 'Binary' Puzzle Eric M. Schmidt, Sage code to compute this sequence (use b=7) Chai Wah Wu, Pigeonholes and repunits, Amer. Math. Monthly, 121 (2014), 529-533. MATHEMATICA With[{cl=Rest[{FromDigits[#, 7], FromDigits[#]}&/@Tuples[{0, 1}, 7]]}, Table[SelectFirst[cl, Mod[ #[[1]], n]==0&], {n, 50}]][[;; , 1]] (* Harvey P. Dale, Feb 01 2024 *) CROSSREFS Cf. A004287 (written in base 7), A004290, A244954-A244960. Sequence in context: A009089 A296466 A202863 * A043071 A304352 A305915 Adjacent sequences: A244955 A244956 A244957 * A244959 A244960 A244961 KEYWORD nonn,base AUTHOR Eric M. Schmidt, Jul 09 2014 EXTENSIONS Data corrected, Offset corrected, Mathematica program corrected and replaced, and b-file replaced by Harvey P. Dale, Feb 01 2024 STATUS approved

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Last modified September 17 21:55 EDT 2024. Contains 375990 sequences. (Running on oeis4.)