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A231139
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Number of (n+1) X (2+1) 0..2 arrays with no element equal to a strict majority of its horizontal and vertical neighbors, with upper left element zero.
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1
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100, 1470, 22870, 352444, 5441634, 83985430, 1296319964, 20008457170, 308827818618, 4766712219328, 73573516286674, 1135596590433446, 17527769351000652, 270538587942685474, 4175724025042070130
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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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FORMULA
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Empirical: a(n) = 14*a(n-1) +28*a(n-2) -83*a(n-3) -92*a(n-4) -342*a(n-5) +134*a(n-6) +890*a(n-7) +432*a(n-8) -32*a(n-9) +80*a(n-10) -320*a(n-11).
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EXAMPLE
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Some solutions for n=3
..0..0..2....0..0..2....0..1..2....0..1..2....0..1..1....0..2..1....0..1..2
..1..1..0....1..2..0....0..2..0....1..0..0....0..2..2....1..1..2....2..2..1
..0..1..2....2..1..2....2..1..1....0..1..1....1..1..1....0..0..0....1..0..1
..1..0..0....1..0..2....1..2..2....1..2..0....2..0..0....2..1..2....2..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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