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A244956 Smallest positive multiple of n whose base-5 representation contains only 0's and 1's. 1
0, 1, 6, 6, 156, 5, 6, 126, 656, 126, 30, 781, 156, 26, 126, 30, 656, 3281, 126, 3781, 780, 126, 3256, 3151, 97656, 25, 26, 756, 756, 15631, 30, 31, 3776, 16401, 3876, 630, 756, 3256, 3876, 156, 3280, 656, 126, 15781, 3256, 630, 16376, 3901, 472656, 15631, 150 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Eric M. Schmidt, Table of n, a(n) for n = 0..1000

Ed Pegg Jr., 'Binary' Puzzle

Eric M. Schmidt, Sage code to compute this sequence (use b=5)

Chai Wah Wu, Pigeonholes and repunits, Amer. Math. Monthly, 121 (2014), 529-533.

MATHEMATICA

spm[n_]:=Module[{k=1}, While[Max[IntegerDigits[k*n, 5]]>1, k++]; k*n]; Join[ {0}, Array[spm, 50]] (* Harvey P. Dale, Sep 29 2019 *)

CROSSREFS

Cf. A004285 (written in base 5), A004290, A244954-A244960.

Sequence in context: A170915 A328186 A123190 * A239532 A165641 A213149

Adjacent sequences:  A244953 A244954 A244955 * A244957 A244958 A244959

KEYWORD

nonn,base

AUTHOR

Eric M. Schmidt, Jul 09 2014

STATUS

approved

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Last modified July 28 07:42 EDT 2021. Contains 346321 sequences. (Running on oeis4.)