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A222874
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Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order
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1
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11, 1814, 409775, 95867967, 22794825314, 5472896849943, 1322676376672081, 321195816580955511, 78284744747263499257, 19135706630178881122106, 4688528991184907785652449, 1151011442556048521433434944
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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=3
..0..1..0..2....0..1..0..1....0..0..1..2....0..0..0..1....0..0..1..2
..0..3..1..1....0..1..2..0....1..3..1..0....2..1..1..2....1..3..1..3
..2..0..2..2....1..1..2..2....1..1..3..2....0..3..0..2....3..3..1..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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