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A036981
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(2n+1) X (2n+1) symmetric matrices each of whose rows is a permutation of 1..(2n+1).
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5
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OFFSET
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0,2
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COMMENTS
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Number of different schedules for 2n+2 teams. - Andres Cardemil (andrescarde(AT)yahoo.com), Nov 28, 2001
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LINKS
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Table of n, a(n) for n=0..6.
Index entries for sequences related to tournaments
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FORMULA
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a(n) = A000438(n+1) * (2*n+1)!
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CROSSREFS
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Cf. A035481, A036980, A000474, A064120, A065594. A000438.
Sequence in context: A168467 A169668 A080369 * A202080 A130688 A214009
Adjacent sequences: A036978 A036979 A036980 * A036982 A036983 A036984
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KEYWORD
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nonn,more
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AUTHOR
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Joshua Zucker and Joe Keane (joshua.zucker(AT)stanfordalumni.org)
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EXTENSIONS
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Two more terms computed from A000438 by Max Alekseyev, Jun 17 2011
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STATUS
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approved
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