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A002086
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Related to the enumeration of symmetric tournaments.
(Formerly M0939 N0353)
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0
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1, 1, 2, 4, 4, 6, 16, 16, 30, 88, 94, 208, 472, 586, 1096, 3280, 5472, 7286, 21856, 26216, 49940, 175104, 182362, 399480, 1048576, 1290556, 3355456, 7456600, 9256396, 17895736, 59660288
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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REFERENCES
| B. Alspach, On point-symmetric tournaments, Canad. Math. Bull., 13 (1970), 317-323.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
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: A185342 A081238 A206987 * A039830 A159788 A179112
Adjacent sequences: A002083 A002084 A002085 * A002087 A002088 A002089
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from Roderick J. Fletcher, Oct 15 1996 (yylee(AT)mail.ncku.edu.tw)
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