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A250514
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Number of (n+1)X(3+1) 0..3 arrays with nondecreasing min(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction
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1
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5996, 205022, 5941982, 166583429, 4464289109, 117638074883, 3049397341176, 78567969110807, 2012530652434693, 51449294606804041, 1312608270113245482, 33467783101961305752, 852737313739021895504, 21723358340006118530026
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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 50 (see link above)
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EXAMPLE
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Some solutions for n=1
..1..2..1..2....0..0..1..2....3..0..1..0....2..0..0..3....2..0..2..0
..2..1..1..1....1..2..1..1....0..1..0..2....0..3..1..3....0..3..0..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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