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A007740 Period of repeating digits of 1/n in base 9. 3
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; text; internal format)
OFFSET

1,5

COMMENTS

Not multiplicative. Smallest counterexample a(5) = a(16) = 2, but a(80) = 2. David W. Wilson Jun 09 2005

LINKS

T. D. Noe, Table of n, a(n) for n=1..1000

Index entries for sequences related to decimal expansion of 1/n

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, Jun 10 2011 *)

CROSSREFS

Sequence in context: A126760 A206437 A296085 * A117811 A297381 A051793

Adjacent sequences:  A007737 A007738 A007739 * A007741 A007742 A007743

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Hal Sampson (hals(AT)easynet.com)

STATUS

approved

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Last modified January 18 04:47 EST 2019. Contains 319269 sequences. (Running on oeis4.)