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A233620
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Number of (2+2)X(n+2) 0..2 arrays with no increasing sequence of length 3 horizontally or diagonally downwards
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1
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430608, 27826929, 1777375908, 113340508656, 7222554443566, 460194589763836, 29320690351065445, 1868112829445921314, 119023011702892254856, 7583305026602442683556, 483154524353295641124009
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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 68 (see link above)
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EXAMPLE
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Some solutions for n=1
..0..0..0....0..2..0....0..2..0....0..2..0....0..2..1....0..0..1....0..0..1
..2..0..0....1..0..0....2..0..0....2..2..2....0..2..1....1..2..0....0..2..1
..0..2..2....0..2..1....1..0..2....2..1..0....2..0..0....1..1..1....1..1..1
..1..0..0....1..2..1....0..2..1....1..1..2....2..2..0....0..0..2....2..1..0
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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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