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A111564
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Number of outerplanar graphs on n unlabeled nodes.
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1
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1, 2, 4, 10, 25, 80, 277, 1150, 5291, 26918, 145744, 828856, 4872771, 29395784, 180857382, 1130700488, 7163245811, 45895629266, 296937363511, 1937625709854, 12739784808937, 84331837321404, 561647630439975, 3761221057579892
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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LINKS
| M. Bordirsky, E. 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
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FORMULA
| Generating function and cycle index sum known, see Vigerske, or Bodirsky, Fusy, Kang and Vigerske.
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CROSSREFS
| Cf. A001004, A097999, A097998, A098000.
Sequence in context: A123422 A123413 A085633 * A007021 A100605 A183947
Adjacent sequences: A111561 A111562 A111563 * A111565 A111566 A111567
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KEYWORD
| nonn
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AUTHOR
| Stefan Vigerske Nov 17 2005
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