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A052431
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Number of perfect simple undirected graphs on n nodes.
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5
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1, 2, 4, 11, 33, 148, 906, 8887, 136756, 3269264, 115811998, 5855499195, 410580177259
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OFFSET
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1,2
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REFERENCES
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A. Brandstaedt, V. B. Le and J. P. Spinrad, Graph Classes: A Survey, SIAM Publications, 1999.
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LINKS
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Florian Kohl, McCabe Olsen, Raman Sanyal, Unconditional reflexive polytopes, arXiv:1906.01469 [math.CO], 2019. Also Discrete and Computational Geom., 64:2 (2020), 427-452.
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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