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A007740
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Period of repeating digits of 1/n in base 9.
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3
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1, 1, 1, 1, 2, 1, 3, 1, 1, 2, 5, 1, 3, 3, 2, 2, 8, 1, 9, 2, 3, 5, 11, 1, 10, 3, 1, 3, 14, 2, 15, 4, 5, 8, 6, 1, 9, 9, 3, 2, 4, 3, 21, 5, 2, 11, 23, 2, 21, 10, 8, 3, 26, 1, 10, 3, 9, 14, 29, 2, 5, 15, 3, 8, 6, 5, 11, 8, 11, 6, 35, 1, 6, 9, 10, 9, 15, 3, 39, 2, 1, 4, 41, 3, 8, 21, 14, 5, 44, 2, 3, 11, 15, 23
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,5
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COMMENTS
| Not multiplicative. Smallest counterexample a(5) = a(16) = 2, but a(80) = 2. David W. Wilson (davidwwilson(AT)comcast.net) Jun 09, 2005.
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..1000
Index entries for sequences related to decimal expansion of 1/n
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MATHEMATICA
| DigitCycleLength[r_Rational, b_Integer?Positive] := MultiplicativeOrder[b, FixedPoint[ Quotient[#, GCD[#, b]] &, Denominator[r]]]; DigitCycleLength[1, b_Integer?Positive] = 1; Array[ DigitCycleLength[1/#, 9] &, 80] (* Robert G. Wilson v, June 10 2011 *)
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CROSSREFS
| Sequence in context: A070099 A126760 A206437 * A117811 A051793 A065371
Adjacent sequences: A007737 A007738 A007739 * A007741 A007742 A007743
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KEYWORD
| nonn,base
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Hal Sampson [ hals(AT)easynet.com ]
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