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A201626
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Number of ways to place n nonattacking wazirs on an n X n toroidal board.
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1
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1, 2, 6, 228, 6745, 252792, 11281312, 585632520, 34690541994, 2309813476870, 170797663069044, 13888215374348892, 1231730727253607451, 118329596584708240732, 12241103359460777972760, 1356712722052907806912016
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OFFSET
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1,2
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COMMENTS
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Wazir is a leaper [0,1].
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LINKS
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FORMULA
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Asymptotics: a(n) ~ n^(2n)/n!*exp(-5/2).
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CROSSREFS
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KEYWORD
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nonn,hard
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AUTHOR
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STATUS
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approved
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