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

Author

T. D. Noe, Feb 25 2010

Keywords

• nonn

Comments

See A173800 for the numbers k for each n.

Links

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