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A222989
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Number of 4Xn 0..2 arrays with no more than floor(4Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order
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1
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14, 70, 584, 4572, 42607, 414907, 4405097, 48718472, 555780434, 6416259672, 74903319364, 877918502428, 10342543515649, 122102452706949, 1445864757738121, 17149126185134333, 203824031565924979
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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..0..0....0..0..0....0..1..1....0..1..1....0..0..1....0..1..2....0..0..0
..0..0..0....0..0..0....1..1..0....1..1..1....0..0..1....2..0..0....0..0..1
..0..1..2....0..1..1....2..2..2....1..1..0....2..1..1....0..0..0....0..0..2
..1..2..2....1..1..1....2..2..2....2..2..2....1..1..1....0..0..0....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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