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A223993
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Number of n X n 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing
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0
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3, 31, 476, 7927, 132119, 2160036, 34534687, 540957770, 8329684774, 126518474741, 1901584578700, 28359907789963, 420651674953990, 6217185029060841, 91703594406693983
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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..1....0..1..2....0..0..2....1..2..2....0..1..1....0..0..0....0..2..2
..0..0..1....0..0..1....0..1..1....0..1..2....0..1..1....0..1..2....0..0..2
..0..1..1....0..1..2....0..1..1....1..1..1....0..2..2....1..2..2....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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