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A251800
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Number of (n+1)X(7+1) 0..3 arrays with no 2X2 subblock having x11-x00 less than x10-x01
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1
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4206453, 1271711747, 413630526506, 145329837643171, 52256028323545001, 19010586449609604592, 6950854990205965398511, 2548249927405969316226847, 935397563567598908162444188, 343605100623054019565873475859
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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=1
..0..0..2..2..0..0..1..3....0..0..0..1..1..3..3..3....0..0..0..0..0..0..2..0
..0..2..0..0..2..2..3..1....0..0..2..2..2..0..3..3....0..0..0..0..3..3..1..3
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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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