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Number of trees with 3-colored leaves.
0

%I #9 Mar 30 2012 17:37:05

%S 1,3,6,6,16,39,114,335,1081,3574,12408,44076,160915,598244,2263400,

%T 8681464,33713947,132305267,524095596,2093208435,8422013745,

%U 34110403728,138979989162,569339728312,2343898451275,9693334574919

%N Number of trees with 3-colored leaves.

%H <a href="/index/Tra#trees">Index entries for sequences related to trees</a>

%F G.f.: A(x) = B(x)+B(x)^2/2+B(x^2)/2-B(x)*(B(x)-2*x), where B(x) = g.f. for A029857.

%K nonn

%O 0,2

%A _Christian G. Bower_, Nov 15 1998.