%I #11 Mar 08 2020 22:47:45
%S 4,8,14,24,42,76,138,254,470,876,1638,3070,5766,10850,20436,38550,
%T 72806,137670,260612,493824,936690,1778360,3379372,6427190,12232928,
%U 23300652,44414366,84713872,161686324,308780220
%N Normalized extreme values for "3x+1" trees of depth n.
%D D. Applegate and J. C. Lagarias, Distribution of 3x+1 trees, Experimental Mathematics 4 (1995),193-209.
%H J. C. Lagarias, <a href="http://www.cecm.sfu.ca/organics/papers/lagarias/paper/html/paper.html">The 3x+1 problem and its generalizations</a>, Amer. Math. Monthly, 92 (1985), 3-23.
%H <a href="/index/3#3x1">Index entries for sequences related to 3x+1 (or Collatz) problem</a>
%H Experimental Mathematics, <a href="http://www.emis.de/journals/EM/">Home Page</a>
%Y Cf. A045474-A045476.
%K nonn
%O 1,1
%A _N. J. A. Sloane_