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A245011
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Number of ways to place n nonattacking princesses on an n X n board.
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1
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1, 4, 6, 86, 854, 9556, 146168, 2660326, 56083228, 1349544632, 36786865968, 1117327217782
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OFFSET
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1,2
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COMMENTS
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A princess moves like a bishop and a knight.
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LINKS
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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STATUS
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approved
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