%I #4 Jul 12 2014 17:36:00
%S 1,0,0,1,1,1,3,3,5,9,12,17,32,42,64,106,157,232,379,563,866,1362,2081,
%T 3186,5028,7710,11924,18659,28938,44842,70254,109245,170266,266562,
%U 416378,650513,1020431,1597803,2504070,3932672,6174777,9698203,15258753,24005178
%N Number of n-node unlabeled rooted trees with thickening limbs and root outdegree (branching factor) 3.
%H Alois P. Heinz, <a href="/A245143/b245143.txt">Table of n, a(n) for n = 4..150</a>
%Y Column k=3 of A245151.
%K nonn
%O 4,7
%A _Alois P. Heinz_, Jul 12 2014