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A222680
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Number of 2Xn 0..3 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order
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1
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2, 1, 5, 10, 25, 150, 359, 2249, 6511, 39991, 119033, 747758, 2254819, 14115927, 43486517, 268330409, 844434635, 5129191736, 16468845241, 98454511005, 322307191185, 1896450581728, 6325288982445, 36644084370361, 124416281370753
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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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All solutions for n=3
..0..1..1....0..0..0....0..0..1....0..0..0....0..0..0
..1..1..1....0..0..0....0..0..0....0..0..1....1..0..0
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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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