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Search: id:A006649
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| A006649 |
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Number of graphs with n nodes, n edges and no isolated vertices.
(Formerly M1474)
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+0
1
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| 1, 2, 5, 15, 41, 124, 369, 1132, 3491, 10984, 34768, 111514, 360560, 1176797, 3870389, 12829765, 42829894, 143980892, 487227611, 1659499566, 5688046485, 19617965938, 68078878268, 237694501644
(list; graph; listen)
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OFFSET
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3,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
W. L. Kocay, Some new methods in reconstruction theory, pp. 89 - 114 of Combinatorial Mathematics IX. Proc. Ninth Australian Conference (Brisbane, August 1981). Ed. E. J. Billington, S. Oates-Williams and A. P. Street. Lecture Notes Math., 952. Springer-Verlag, 1982.
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CROSSREFS
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Cf. A001434, A048179.
Sequence in context: A148348 A148349 A076865 this_sequence A148350 A094176 A084086
Adjacent sequences: A006646 A006647 A006648 this_sequence A006650 A006651 A006652
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Mar 02 2008
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