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 A007735 Period of base 4 representation of 1/n. 3
 1, 1, 1, 1, 2, 1, 3, 1, 3, 2, 5, 1, 6, 3, 2, 1, 4, 3, 9, 2, 3, 5, 11, 1, 10, 6, 9, 3, 14, 2, 5, 1, 5, 4, 6, 3, 18, 9, 6, 2, 10, 3, 7, 5, 6, 11, 23, 1, 21, 10, 4, 6, 26, 9, 10, 3, 9, 14, 29, 2, 30, 5, 3, 1, 6, 5, 33, 4, 11, 6, 35, 3, 9, 18, 10, 9, 15, 6, 39, 2, 27, 10, 41, 3, 4, 7, 14, 5, 11, 6, 6, 11, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 LINKS T. D. Noe, Table of n, a(n) for n=1..1000 MATHEMATICA DigitCycleLength[r_Rational, b_Integer?Positive] := MultiplicativeOrder[b, FixedPoint[ Quotient[#, GCD[#, b]] &, Denominator[r]]]; DigitCycleLength[1, b_Integer?Positive] = 1; Array[ DigitCycleLength[1/#, 4] &, 80] (* Robert G. Wilson v, Jun 10 2011 *) CROSSREFS Sequence in context: A014599 A274771 A075825 * A002616 A046073 A162912 Adjacent sequences:  A007732 A007733 A007734 * A007736 A007737 A007738 KEYWORD nonn AUTHOR N. J. A. Sloane, Hal Sampson (hals(AT)easynet.com) EXTENSIONS More terms from David W. Wilson STATUS approved

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Last modified January 17 06:34 EST 2019. Contains 319207 sequences. (Running on oeis4.)