%I #8 Dec 12 2014 19:30:35
%S 1,2,3,7,12,29,61,162,412,1221,3665,12031,40514,143244,518247,1926638,
%T 7285835,28013935,109058879,429366751
%N Number of bipartite outerplanar graphs on n unlabeled nodes.
%H M. Bordirsky, É. Fusy, M. Kang and S. Vigerske, <a href="http://www.arXiv.org/abs/math.CO/0511422">Enumeration of Unlabeled Outerplanar Graphs</a>, 2005
%H S. Vigerske, <a href="http://www.informatik.hu-berlin.de/Forschung_Lehre/algorithmen/en/forschung/planar/vigerske.html">Asymptotic enumeration of unlabeled outerplanar graphs, Diploma thesis</a>, Humboldt University Berlin, 2005
%H S. Vigerske, <a href="http://www.math.hu-berlin.de/~stefan">Homepage</a>
%F Generating function and cycle index sum known, see Vigerske.
%Y Cf. A111564.
%K nonn
%O 1,2
%A Stefan Vigerske, Nov 21 2005