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A007080
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Number of labeled Eulerian digraphs with n nodes.
(Formerly M1989)
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4
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1, 2, 10, 152, 7736, 1375952, 877901648, 2046320373120, 17658221702361472, 569773219836965265152, 69280070663388783890248448
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| B. D. McKay, Applications of a technique for labeled enumeration, Congress. Numerantium, 40 (1983), 207-221.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
| Sequence in context: A086619 A194026 A165940 * A134088 A076659 A197313
Adjacent sequences: A007077 A007078 A007079 * A007081 A007082 A007083
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KEYWORD
| nonn,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Mira Bernstein (mira(AT)math.berkeley.edu)
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