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A203384
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Number of nX3 0..6 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors
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1
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1, 49, 2422, 65653, 1644254, 50848495, 1678700434, 53072796241, 1649245811476, 51903280283513, 1647521450906196, 52245121787738051, 1654347109122722606, 52425103603449132267, 1662926668505201957635, 52761390157082419940463
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OFFSET
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1,2
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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..2..0....4..4..0....3..4..4....1..3..3....2..5..5....3..3..0....2..3..3
..5..5..4....4..4..0....4..4..4....6..6..4....4..5..5....4..4..3....2..3..3
..5..5..4....2..3..3....4..2..4....6..6..4....6..6..1....5..5..3....1..5..5
..0..4..4....0..3..3....4..4..4....0..1..1....6..6..0....5..5..2....0..5..5
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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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