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A206792
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Number of nX3 0..3 arrays avoiding the pattern z z+1 z in any row, column, diagonal or antidiagonal
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1
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61, 3721, 180446, 8683735, 420657877, 20388622016, 988006480837, 47875604265753, 2319909967411854, 112416368647596277, 5447383252826053743, 263964878153391214108, 12790995849530364514091, 619815723744309803868951
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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
..1..0..2....0..0..3....3..2..2....2..1..2....0..0..3....2..0..3....1..1..0
..3..2..1....0..1..1....0..2..3....3..0..1....2..3..1....0..2..0....3..2..3
..1..0..3....2..1..2....3..0..1....3..0..0....1..2..0....3..1..1....3..0..0
..3..0..1....2..1..2....2..3..3....1..3..0....2..0..0....2..0..2....2..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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