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A202734
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Number of nX7 nonnegative integer arrays each row and column an ascent sequence (interior element no greater than one plus up-steps preceding it) and the lower right element equal to min(n,7)-1
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1
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1, 32, 2062, 184848, 12219684, 182593546, 51871384, 4025241096124, 36422682546205910, 131056226079716655758, 280757551199231043765836, 441077319990976298095629110, 574350179584926874304293083870
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=4
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
..0..0..1..1..0..1..1....0..0..0..1..0..1..1....0..1..0..0..1..0..1
..0..0..1..0..1..2..2....0..1..0..1..0..0..2....0..0..1..1..0..1..2
..0..1..0..0..2..2..3....0..1..0..0..0..2..3....0..1..0..1..1..0..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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