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A204974
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Number of nX4 0..2 arrays with no occurrence of three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..2 introduced in row major order
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1
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11, 726, 16813, 451468, 11815256, 311275169, 8202482914, 216132492162, 5694910498914, 150054777556991, 3953775892498008, 104177764014536592, 2744972159153714019, 72327078831355250520, 1905740996306739704109
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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..1..0..1....0..0..1..1....0..0..1..1....0..1..1..0....0..1..2..0
..2..0..1..1....1..0..1..1....2..0..0..2....1..2..2..1....1..2..2..0
..2..0..2..2....1..2..2..0....0..1..2..2....2..2..1..0....0..1..1..2
..0..1..2..2....2..2..1..0....2..1..1..0....0..0..1..2....0..1..2..1
..2..1..0..0....0..0..1..1....2..2..0..2....2..2..0..2....2..0..2..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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