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A234395
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Number of (2+2)X(n+2) 0..3 arrays with no increasing sequence of length 3 horizontally or diagonally downwards
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1
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9292808, 1687142836, 312048302829, 57796098504371, 10689939176311218, 1976898869137875008, 365629104612615854980, 67624525811802767580890, 12507319228907396001450322, 2313255231517134891957912331
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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 85 (see link above)
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EXAMPLE
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Some solutions for n=1
..0..0..1....0..0..0....0..0..1....1..0..1....0..0..0....0..0..0....1..0..0
..0..0..3....0..0..2....0..0..2....0..1..0....0..0..3....0..0..3....0..0..2
..1..0..0....3..0..2....0..1..1....1..1..3....3..0..0....3..1..3....3..0..0
..1..2..3....0..1..1....3..0..0....1..1..1....2..0..2....1..1..0....3..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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