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%I #6 Dec 08 2016 12:22:14
%S 90,45,134,67,200,100,50,25,74,37,110,55,164,82,41,122,61,182,91,272,
%T 136,68,34,17,50,25,74,37,110,55,164,82,41,122,61,182,91,272,136,68,
%U 34,17,50,25,74,37,110,55,164
%N x->x/2 if x even, x->3x-1 if x odd.
%D R. K. Guy, Unsolved Problems in Number Theory, E16.
%H <a href="/index/Rec#order_18">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).
%K nonn
%O 0,1
%A _N. J. A. Sloane_.
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