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A203667
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Number of (n+1)X4 0..6 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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1
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111648, 6780455, 258487684, 7178236454, 150678768765, 2567705516301, 36453931556452, 446170354019486, 4795059967006464, 46124639612757140, 402302169592929650, 3220308535488715027, 23878162751692839974
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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..6..3..6....2..5..1..1....5..5..4..4....3..4..5..5....5..6..5..5
..6..3..6..3....5..2..6..6....5..5..6..6....1..6..5..5....6..5..6..6
..3..6..3..6....1..6..6..6....4..6..6..6....3..5..6..6....5..6..6..6
..6..3..6..3....4..6..6..6....4..6..6..6....3..5..6..6....5..6..6..6
..3..6..3..6....6..6..6..6....6..6..6..6....2..6..6..6....5..6..6..6
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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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