A111759 Number of bipartite outerplanar graphs on n unlabeled nodes.

1, 2, 3, 7, 12, 29, 61, 162, 412, 1221, 3665, 12031, 40514, 143244, 518247, 1926638, 7285835, 28013935, 109058879, 429366751

Offset: 1

Author

Stefan Vigerske, Nov 21 2005

Keywords

• nonn

Links

• M. Bordirsky, É. Fusy, M. Kang and S. Vigerske, Enumeration of Unlabeled Outerplanar Graphs, 2005
• S. Vigerske, Asymptotic enumeration of unlabeled outerplanar graphs, Diploma thesis, Humboldt University Berlin, 2005
• S. Vigerske, Homepage

Crossrefs

Cf. A111564.

Formula

Generating function and cycle index sum known, see Vigerske.