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A223713
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Number of nX4 0..1 arrays with row sums and column sums unimodal
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1
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11, 155, 1805, 18496, 170568, 1470857, 11966981, 93299973, 701423479, 5128436121, 36599373747, 256236584115, 1763984442229, 11980047684055, 80385275288827, 534085541609370, 3517085278076966, 22991638514887063, 149296025431319355
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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
..0..0..1..0....0..1..1..1....0..1..0..0....1..0..0..0....1..1..0..0
..0..1..1..0....0..1..1..0....1..1..1..1....0..1..1..0....1..0..0..0
..0..0..1..0....0..0..0..1....0..0..1..1....0..0..1..1....0..1..0..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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