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A136043 Period-lengths of the base-2 MR-expansions of the reciprocals of the positive integers. 4
1, 1, 1, 1, 2, 1, 1, 1, 3, 2, 5, 1, 6, 1, 1, 1, 4, 3, 9, 2, 2, 5, 4, 1, 10, 6, 9, 1, 14, 1, 1, 1, 5, 4, 5, 3, 18, 9, 4, 2, 10, 2, 7, 5, 5, 4, 9, 1, 10, 10, 2, 6, 26, 9, 8, 1, 9, 14, 29, 1, 30, 1, 1, 1, 6, 5, 33, 4, 11, 5, 14, 3, 3, 18, 9, 9, 15, 4, 17, 2, 27, 10, 41, 2, 2, 7, 11, 5, 4, 5, 4, 4, 3, 9, 14 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

It appears that if p is a prime with 2 as a primitive root (A001122), then a(p)=(p-1)/2. This has been confirmed for primes up to 2000. See A136042 for the definition of the MR-expansion of a positive real number.

LINKS

Table of n, a(n) for n=1..95.

EXAMPLE

In A136042 it is shown that the base-2 MR-expansion of 1/5 is {3,1,3,1,3,1,3,1,...}, with period-length 2, so a(5)=2.

CROSSREFS

Cf. A001122, A136042, A135044.

Sequence in context: A057774 A089355 A302126 * A336420 A254055 A096815

Adjacent sequences:  A136040 A136041 A136042 * A136044 A136045 A136046

KEYWORD

nonn

AUTHOR

John W. Layman, Dec 12 2007

STATUS

approved

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Last modified May 12 07:28 EDT 2021. Contains 343821 sequences. (Running on oeis4.)