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A204681
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Number of nX4 0..3 arrays with no occurrence of three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..3 introduced in row major order
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1
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12, 2191, 287379, 40919141, 5770321516, 815364171994, 115180678788869, 16271532972153414, 2298647402512667451, 324726122304981135405, 45873499136412060284740, 6480470930161792394441041
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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=5
..0..0..1..2....0..0..1..0....0..0..1..0....0..0..1..2....0..0..1..1
..0..1..2..1....1..1..2..0....1..0..1..0....1..2..1..1....0..0..2..0
..2..3..1..2....2..0..1..1....0..1..2..2....3..2..0..3....3..1..2..0
..0..2..2..3....2..0..2..2....2..3..2..2....3..0..1..3....3..1..1..2
..2..0..0..1....1..1..3..2....3..1..1..3....2..1..1..2....0..2..0..2
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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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