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A207279
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Number of nX4 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column, diagonal or antidiagonal
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1
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214, 45796, 4686270, 553738958, 65396633910, 7655462652196, 895547972671398, 104837508468573926, 12276503049659515050, 1437524784977879770604, 168318455922909141130486, 19708184921537975123608340
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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
..2..0..2..0....3..0..1..1....2..1..0..0....3..3..0..1....3..0..0..1
..1..0..3..2....0..3..2..0....3..0..0..1....3..2..1..1....3..2..2..0
..3..1..3..1....1..2..0..0....1..2..3..3....2..1..1..0....2..2..1..3
..1..3..2..0....1..0..0..1....3..2..0..0....2..0..3..0....0..1..1..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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