%I #6 Jul 11 2015 00:13:34
%S 1,1,2,4,8,18,43,103,255,642,1640,4242,11096,29278,77882,208589,
%T 562056,1522606,4144521,11329608,31090910,85618848,236530942,
%U 655344579,1820585313,5070138554,14151907583,39584395796,110938500821,311481097178
%N Number of 3-bead necklaces where each bead is an unlabeled rooted tree, by total number of nodes.
%Y See A058855 (the 6-bead analog) for details.
%K nonn
%O 0,3
%A _N. J. A. Sloane_, Jan 18 2001