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The number of primitive numbers k such that 1/k is in the Cantor set and the fraction 1/k has period n.
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%I #3 Mar 30 2012 17:22:55

%S 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,

%T 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,

%U 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

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

%C See A173800 for the numbers k for each n.

%H T. D. Noe, <a href="/A173801/b173801.txt">Table of n, a(n) for n=1..200</a>

%K nonn

%O 1,4

%A _T. D. Noe_, Feb 25 2010