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%I
%S 39,126,63,198,99,306,153,468,234,117,360,180,90,45,144,72,36,18,9,36,
%T 18,9,36,18,9,36,18,9,36,18,9,36,18,9,36,18,9,36,18,9,36,18,9,36,18,9,
%U 36,18,9,36,18,9,36,18,9,36,18,9,36,18,9,36,18,9,36,18,9
%N Trajectory of 39 under map x -> x/2 if x even, 3x+9 if x odd.
%Y Cf. A067896.
%K nonn
%O 1,1
%A _Ernst Berg_, May 17 2003
%E More terms from _Jinyuan Wang_, Apr 07 2020
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