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A220458
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Equals one maps: number of n X 4 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, vertical and antidiagonal neighbors in a random 0..1 n X 4 array.
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0
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8, 74, 691, 6255, 58217, 530196, 4787009, 42979644, 385002942, 3443191561, 30764444125
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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
..1..0..1..1....1..0..0..1....0..1..1..1....0..1..0..0....1..0..0..1
..0..0..0..1....0..0..1..1....0..0..0..0....0..0..0..1....0..0..0..0
..1..0..0..1....1..0..0..0....1..1..0..1....0..1..1..1....0..0..1..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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