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A224127
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Number of n X n 0..1 arrays with rows nondecreasing and antidiagonals unimodal.
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1
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2, 9, 58, 419, 3149, 24095, 186348, 1452236, 11385356, 89697284, 709549769, 5632222541, 44837998135, 357848802839, 2862135963926, 22934807116783, 184082328044394, 1479641153930348, 11908495546392890, 95951907989239148
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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..1..1....0..0..0....0..1..1....0..0..1....1..1..1....0..0..1....0..0..1
..0..1..1....0..0..0....1..1..1....0..0..1....0..0..1....0..1..1....0..0..0
..0..1..1....0..1..1....0..1..1....0..0..1....0..1..1....0..0..1....0..1..1
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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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