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A224140
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Number of n X n 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing
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1
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2, 9, 49, 272, 1509, 8375, 46586, 259927, 1454873, 8167578, 45975525, 259412481, 1466771294, 8308711329, 47142516717, 267868554552, 1524033271457, 8681096155047, 49500982033342, 282533898125471, 1614019099745197
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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
..1..1..1....0..1..0....0..1..1....1..0..0....0..0..0....0..0..0....0..0..0
..1..1..1....0..1..0....0..1..1....1..0..0....0..0..0....1..1..0....0..0..0
..1..1..1....0..1..1....0..1..1....1..1..0....1..1..1....1..1..1....0..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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