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A190393
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Number of ways to place n nonattacking nightriders on an n X n toroidal board.
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3
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1, 2, 6, 24, 120, 144, 28, 1408, 2025, 86400, 1782, 1092096, 4186, 31360, 241920000, 23953408, 140692, 114108912, 1092690
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OFFSET
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1,2
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COMMENTS
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A nightrider is a fairy chess piece that can move (proportionate to how a knight moves) in any direction.
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CROSSREFS
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KEYWORD
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nonn,nice,hard,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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