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A181398
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Summed lengths of nonintersecting rook paths on an n X n board.
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5
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0, 4, 64, 1912, 148432, 32871240, 20744801272, 37559607987584, 198461813970383240, 3100218604533034920976, 144170284249598867501946128, 20038589080922552365824887715432, 8349298401437323416105571304163524760, 10453318954664242363219930783045003561923656
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OFFSET
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1,2
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COMMENTS
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Paths are self-avoiding from one corner to the diagonally opposite corner.
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LINKS
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EXAMPLE
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For 2 x 2: right+down (length 2), down+right (length 2), s(2) = 2+2 = 4
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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