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A203733
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Number of (n+1)X(n+1) 0..3 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) nondecreasing in column and row directions, respectively
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0
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90, 3912, 178836, 7927078, 325435792, 12852015708, 513715285322, 21463727483530, 946913403808620, 43905367195100872, 2117084835230553844, 105066513574419532846
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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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EXAMPLE
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Some solutions for n=4
..3..0..0..1..1....2..1..0..1..2....0..1..0..3..1....0..3..1..1..3
..0..3..3..3..3....1..2..3..3..3....2..1..2..1..3....2..1..3..3..3
..1..3..3..3..3....2..2..3..3..3....0..3..2..3..2....0..3..3..3..3
..2..3..3..3..3....3..3..3..3..3....1..2..3..2..3....1..3..3..3..3
..2..3..3..3..3....3..3..3..3..3....3..3..2..3..2....3..3..3..3..3
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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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