A173801 The number of primitive numbers k such that 1/k is in the Cantor set and the fraction 1/k has period n.

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

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: A349059 A002033 A074206 * A368198 A108466 A211110

Adjacent sequences: A173798 A173799 A173800 * A173802 A173803 A173804

Keyword

nonn

Author

T. D. Noe, Feb 25 2010

Status

approved