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A186557
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Number of (n+1)X5 0..3 arrays with no 2X2 subblock commuting with any of its horizontal and vertical 2X2 subblock neighbors
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4
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927477, 783375343, 663296784123, 561714653720250, 475681559860717916, 402827283017904807331, 341131017852900112413067, 288884064380556803805427879, 244639147969972250796140260427
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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 3X5
..0..0..0..0..1....0..0..0..2..3....2..0..3..2..3....2..0..3..2..1
..2..0..2..0..0....2..0..2..0..3....2..0..2..0..3....2..0..2..3..2
..0..0..2..1..2....0..0..1..0..3....0..0..2..2..1....0..0..1..3..3
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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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