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A222915
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Number of n X 4 0..2 arrays with exactly floor(n X 4/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order.
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1
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6, 136, 2952, 62336, 1309863, 27663713, 590514107, 12759661261, 278866376604, 6155545744454, 137016855340060, 3071168910680644, 69236193887795927, 1568315505284861894, 35666332338351971086, 813825644002258220522
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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..1....0..1..1..2....0..1..0..2....0..1..0..0....0..0..1..0
..2..1..1..2....2..2..2..1....0..0..1..0....2..1..1..1....0..0..2..1
..0..2..0..2....0..1..0..2....1..2..0..1....0..2..0..2....1..1..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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