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A220540
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Equals one maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 4Xn array
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0
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1, 96, 322, 6620, 42066, 541829, 4737799, 50261056, 476949627, 4828330418, 47120284988, 469126471434, 4617294604461
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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=3
..1..0..1....1..1..1....0..0..0....0..0..0....1..0..1....0..0..0....1..1..1
..1..0..0....1..0..0....0..0..1....0..1..0....1..1..0....1..0..1....1..0..0
..1..0..0....1..0..0....1..0..1....0..0..1....0..0..0....1..0..1....1..0..1
..1..1..1....1..1..1....0..1..0....1..1..1....0..0..0....0..0..0....1..0..1
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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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