

A175174


Least primitive number k such that 1/k is in the Cantor set and the fraction 1/k has period n in base 3.


1



1, 4, 13, 10, 121, 28, 1093, 82, 757, 244, 88573, 730, 797161, 2188, 59293, 6562, 64570081, 1036, 581130733, 2362, 4785157, 177148, 47071589413, 84253, 3501192601, 1594324, 387440173, 4782970, 34315188682441, 66124
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OFFSET

1,2


COMMENTS

Primitive means that 3 does not divide k. The term a(n) is the first term in row n of A173800. For n=p^k, with p prime and k>0, it appears that a(n) = Phi(n,3), the nth cyclotomic polynomial evaluated at 3.


LINKS



CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



