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A250455
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Number of (n+2) X (1+2) 0..2 arrays with nondecreasing maximum of every three consecutive values in every row and column.
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1
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19683, 373248, 6859000, 120553784, 1990865512, 32248529487, 512192024001, 7998800059999, 123781481019253, 1900633644603000, 29012551351120576, 441121225835112256, 6686195501981749312, 101112177444306318837
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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 83 (see link above).
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EXAMPLE
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Some solutions for n=1
..1..1..0....2..2..0....0..0..2....2..2..0....2..1..1....0..1..0....2..1..0
..1..2..0....0..1..1....2..2..1....2..0..1....1..1..0....1..0..2....0..1..0
..2..2..2....0..1..0....0..1..0....0..2..2....1..1..0....0..2..2....0..0..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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