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A183549
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Number of nX4 0..2 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors
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1
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9, 299, 5287, 95101, 1728533, 31363527, 569461759, 10339213765, 187720469393, 3408294462361, 61881741606489, 1123538699592837, 20399220213631985, 370372813824090515, 6724571832069212589, 122092833670153549855
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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 3X4
..2..0..0..0....1..1..1..1....0..0..0..1....1..1..0..0....2..2..2..0
..2..2..0..1....0..1..1..1....2..2..0..1....1..1..0..2....1..2..2..0
..2..0..0..1....0..1..0..0....2..2..0..0....0..0..2..2....1..1..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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