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Search: id:A036981
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A036981 (2n+1) X (2n+1) symmetric matrices each of whose rows is a permutation of 1..(2n+1). +0
6
1, 6, 720, 31449600, 444733651353600 (list; graph; listen)
OFFSET

0,2

COMMENT

Number of different schedules for 2n+2 teams. - Andres Cardemil (andrescarde(AT)yahoo.com), Nov 28, 2001

LINKS

Index entries for sequences related to tournaments

CROSSREFS

Cf. A035481, A036980, A000474, A064120, A065594. A000438 equals A036981 / (2n+1)!.

Sequence in context: A002204 A052295 A080369 this_sequence A130688 A088217 A020542

Adjacent sequences: A036978 A036979 A036980 this_sequence A036982 A036983 A036984

KEYWORD

nonn

AUTHOR

Joshua Zucker and Joe Keane (joshua.zucker(AT)stanfordalumni.org)

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.


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