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A251061
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Number of (n+1)X(4+1) 0..2 arrays with no 2X2 subblock having x11-x00 less than x10-x01
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1
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3123, 89429, 2482824, 71431719, 2062530658, 59730054958, 1731036678270, 50188065312931, 1455292342943790, 42201961348177580, 1223840515308222344, 35491430464043617892, 1029257212053833200296, 29848718048671125722468
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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=2
..0..1..2..2..2....0..1..1..1..2....1..1..1..0..0....0..0..2..1..2
..1..2..1..1..2....0..1..1..1..1....1..1..1..2..2....0..1..0..2..2
..0..0..1..2..2....0..0..2..2..2....0..0..1..0..2....1..1..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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