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A173801 The number of primitive numbers k such that 1/k is in the Cantor set and the fraction 1/k has period n. 2
1, 1, 1, 2, 1, 3, 1, 4, 2, 3, 1, 9, 1, 3, 3, 9, 1, 14, 1, 12, 3, 3, 1, 28, 2, 3, 5, 9, 1, 32, 1, 17, 3, 3, 3, 50, 1, 3, 5, 31, 1, 32, 1, 9, 14, 4, 1, 97, 2, 10, 3, 9, 1, 57, 4, 27, 3, 4, 1, 160, 1, 3, 9, 34, 3, 32, 1, 9, 3, 23, 1, 193, 1, 3, 10, 9, 3, 51, 1, 102, 9, 3, 1, 148, 3, 3, 3, 28, 1, 255, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

See A173800 for the numbers k for each n.

LINKS

T. D. Noe, Table of n, a(n) for n=1..200

CROSSREFS

Sequence in context: A118314 A002033 A074206 * A108466 A211110 A325828

Adjacent sequences:  A173798 A173799 A173800 * A173802 A173803 A173804

KEYWORD

nonn

AUTHOR

T. D. Noe, Feb 25 2010

STATUS

approved

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Last modified February 26 12:33 EST 2020. Contains 332279 sequences. (Running on oeis4.)