%I
%S 3,6,28,156,948,6206,42504,301548,2195100,16307598,123128940,
%T 942125110,7289062320,56926578912,448186662992,3553364598786,
%U 28345260090444,227337020914322,1832102040838776,14828608892376288,120485979704314764,982422914174633154,8036158136627878572
%N Number of rooted gene trees with n leaves on the label set [3].
%H Andrew Howroyd, <a href="/A220823/b220823.txt">Table of n, a(n) for n = 1..200</a>
%H V. P. Johnson, <a href="http://people.math.sc.edu/czabarka/Theses/JohnsonThesis.pdf">Enumeration Results on Leaf Labeled Trees</a>, Ph. D. Dissertation, Univ. Southern Calif., 2012.
%Y Column 3 of A319254.
%K nonn
%O 1,1
%A _N. J. A. Sloane_, Dec 22 2012
%E Terms a(11) and beyond from _Andrew Howroyd_, Sep 17 2018
