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A250639
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Number of (7+1)X(n+1) 0..2 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction
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1
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18131, 130848, 994281, 6421141, 37072806, 195029867, 955747123, 4434468137, 19743654581, 85056866597, 357013012798, 1466786801347, 5922724257697, 23575899972899, 92755869280688, 361451442730899, 1397475019582942
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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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FORMULA
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Empirical recurrence of order 79 (see link above)
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EXAMPLE
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Some solutions for n=2
..0..0..0....0..0..0....0..0..1....0..0..0....0..0..1....0..0..0....0..0..1
..0..0..2....0..0..2....0..1..0....2..0..2....0..0..1....1..0..1....0..1..1
..0..0..2....1..1..1....1..0..2....0..2..1....0..0..1....0..1..1....0..1..1
..0..1..2....0..2..1....0..1..2....1..1..2....0..0..2....1..0..2....0..1..2
..0..1..2....1..1..2....0..1..2....0..2..1....0..1..1....0..1..1....0..2..1
..1..1..2....1..1..2....1..2..1....2..1..2....0..1..1....0..1..1....1..1..2
..2..1..2....0..2..2....2..1..2....1..2..1....2..2..2....0..1..2....1..1..2
..1..2..1....2..2..2....1..2..1....2..1..2....2..2..2....1..2..2....2..2..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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