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A233612
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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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395955, 27826929, 1955165211, 137370562281, 9651696380883, 678130944334209, 47645673900633963, 3347598657948373881, 235203237936279213219, 16525446682220210003409, 1161082604317640744905083
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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: a(n) = 75*a(n-1) -279*a(n-2) -4023*a(n-3) +15264*a(n-4) +56196*a(n-5) -228096*a(n-6) +186624*a(n-7)
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EXAMPLE
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Some solutions for n=1
..0..0..1..1....0..0..1..1....0..2..1..2....0..2..0..1....0..1..1..2
..0..0..1..0....2..0..2..2....2..1..2..2....2..0..2..1....2..1..0..1
..2..0..1..0....0..0..1..0....0..1..0..1....2..2..1..0....2..1..1..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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