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A208350
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Number of nX5 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors)
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1
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51, 7780, 153237, 4773885, 191586797, 8045978096, 340596199800, 14513602070899, 621231491393354, 26619820042892506, 1141266433540198765, 48945495491297801080, 2099487944721769270814, 90063058254133100176716
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=4
..0..1..0..2..2....0..0..1..0..2....0..0..0..0..0....0..0..0..0..1
..2..3..3..2..2....2..1..1..2..2....1..2..1..1..1....1..2..2..2..2
..0..1..3..1..0....2..3..3..3..3....2..2..2..3..2....1..1..3..3..3
..0..0..1..0..1....2..0..0..0..0....0..0..3..0..0....0..0..0..3..0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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