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A004284 Least positive multiple of n written in base 4 using only 0 and 1. 2
1, 10, 111, 10, 11, 1110, 111, 100, 1101, 110, 11111, 1110, 1001, 1110, 111111, 100, 101, 11010, 100111, 110, 111, 111110, 1011, 11100, 11011, 10010, 1101, 1110, 10011, 1111110, 11111, 1000, 101001, 1010, 111111, 11010, 1001111 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..200

MATHEMATICA

lpm4[n_]:=Module[{k=1}, While[Rest[Most[DigitCount[n k, 4]]]!={0, 0}, k++]; FromDigits[IntegerDigits[n k, 4]]]; Array[lpm4, 40] (* Harvey P. Dale, Dec 22 2012 *)

CROSSREFS

Sequence in context: A282412 A282679 A086996 * A119484 A281749 A282364

Adjacent sequences:  A004281 A004282 A004283 * A004285 A004286 A004287

KEYWORD

nonn,base

AUTHOR

David W. Wilson

STATUS

approved

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Last modified September 20 02:20 EDT 2019. Contains 327207 sequences. (Running on oeis4.)