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A004303 C(2n-2,n-1)/n - 2^(n-1) + n.
(Formerly M3015)
+0
1
1, 1, 1, 3, 16, 75, 309, 1183, 4360, 15783, 56750, 203929, 734722, 2658071, 9662093, 35292151, 129513736, 477376575, 1766738922, 6563071865, 24464169890 (list; graph; listen)
OFFSET

2,4

REFERENCES

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.

CROSSREFS

Sequence in context: A012279 A037098 A038602 this_sequence A005947 A003769 A005386

Adjacent sequences: A004300 A004301 A004302 this_sequence A004304 A004305 A004306

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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