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A036981
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Number of (2n+1) X (2n+1) symmetric matrices each of whose rows is a permutation of 1..(2n+1).
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6
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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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FORMULA
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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