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A197438
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Number of nX4 0..2 arrays with no element equal to the average of its horizontal and vertical neighbors
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1
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28, 1736, 98356, 5184780, 279785830, 15068331840, 811669674888, 43723066740718, 2355282493094894, 126874994917842426, 6834535322256736280, 368164567512212216530, 19832386906421976298012, 1068336297549353928162784
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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=5
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..1..1..1..2....1..1..2..1....1..1..1..2....1..1..2..1....1..1..1..2
..0..1..2..0....1..2..1..2....0..0..2..2....0..0..0..0....1..0..0..2
..0..0..0..1....1..0..0..1....1..2..0..1....1..2..1..2....0..2..0..0
..2..2..1..0....0..0..2..2....2..1..1..0....0..2..2..1....2..2..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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