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Search: id:A004303
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| A004303 |
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C(2n-2,n-1)/n - 2^(n-1) + n.
(Formerly M3015)
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+0
1
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| 1, 1, 1, 3, 16, 75, 309, 1183, 4360, 15783, 56750, 203929, 734722, 2658071, 9662093, 35292151, 129513736, 477376575, 1766738922, 6563071865, 24464169890
(list; graph; listen)
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OFFSET
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2,4
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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).
J. W. Moon, A problem on arcs without bypasses in tournaments, J. Combin. Theory B 21 (1976), 71-75.
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CROSSREFS
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Sequence in context: A012279 A037098 A038602 this_sequence A005947 A003769 A005386
Adjacent sequences: A004300 A004301 A004302 this_sequence A004304 A004305 A004306
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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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