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A250541
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Number of (n+1)X(5+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)-x(i-1,j) in the j direction
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1
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187000, 2701872, 23289547, 151170400, 824599694, 4013192386, 18064444143, 76961701472, 315204675572, 1254564769204, 4890689086931, 18781896020328, 71371001739442, 269293563149046, 1011736459116935, 3793520599786824
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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) = 30*a(n-1) -415*a(n-2) +3514*a(n-3) -20386*a(n-4) +85924*a(n-5) -272198*a(n-6) +661180*a(n-7) -1244717*a(n-8) +1822478*a(n-9) -2068955*a(n-10) +1802474*a(n-11) -1181760*a(n-12) +563888*a(n-13) -184752*a(n-14) +37152*a(n-15) -3456*a(n-16)
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EXAMPLE
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Some solutions for n=1
..2..2..0..0..2..1....2..2..0..2..1..2....2..3..2..1..0..1....2..2..1..0..1..0
..0..0..1..1..3..2....1..3..1..3..2..3....0..1..3..2..1..3....0..2..1..1..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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