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A234375
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Number of (n+2)X(2+2) 0..2 arrays with no increasing sequence of length 3 horizontally or diagonally downwards
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1
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406416, 24485940, 1443868938, 84764693441, 4966249171199, 290807719744802, 17025314469552162, 996684368791537441, 58345976442195013994, 3415554697297597829788, 199945020738674492679622
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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 55 (see link above)
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EXAMPLE
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Some solutions for n=1
..0..0..1..2....0..0..0..1....0..0..1..1....0..1..2..1....0..1..2..2
..2..2..2..2....1..0..0..0....0..2..2..1....0..0..1..1....0..0..0..1
..2..1..0..0....1..1..1..0....2..1..2..1....0..2..2..1....2..0..0..2
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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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