%I #4 Mar 30 2012 17:28:43
%S 0,1,1,2,1,2,2,2,1,2,2,3,2,1,2,3,2,2,3,3,3,3,2,2,3,2,1,2,1,2,1,2,0,2,
%T 1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,0,2,1,2,2,2,1,2,2,2,1,2,1,2,1,2,
%U 1,2,1,2,2,2,1,2,1,2,1,2,1,2,2,1,2,2,1,1,1,2,2,2,1,2,2,3,1,3,1,1,1,2,1,3,1
%N Length of preperiodic part of trajectory of n under iteration of the base-3 Kaprekar map in A164993
%H Joseph Myers, <a href="/A164995/b164995.txt">Table of n, a(n) for n=0..2187</a>
%H <a href="/index/K#Kaprekar_map">Index entries for the Kaprekar map</a>
%Y Cf. A164993, A164996.
%Y In other bases: A164885 (base 2), A165014 (base 4), A165034 (base 5), A165053 (base 6), A165073 (base 7), A165092 (base 8), A165112 (base 9), A151962 (base 10).
%K base,nonn
%O 0,4
%A _Joseph Myers_, Sep 04 2009
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