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A224152
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Number of n X n 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.
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1
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2, 12, 89, 574, 3469, 20065, 114537, 650819, 3705824, 21181267, 121617211, 701255335, 4058735341, 23565789117, 137190976378, 800437914689, 4678794395883, 27391873966579, 160581355210547, 942493889605853
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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..0....1..1..0....1..0..0....0..0..0....1..1..0....0..1..0....0..0..0
..0..0..0....1..1..0....0..1..0....0..0..0....1..0..0....1..1..1....0..1..0
..1..0..0....1..0..0....1..0..0....0..0..1....0..1..0....1..1..1....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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