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A223754
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Number of 3X(n+1) 0..3 arrays with every row least squares fitting to a positive slope straight line and every column least squares fitting to a zero or positive slope straight line, with a single point array taken as having zero slope
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1
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120, 4800, 330642, 12302880, 604821816, 22711440400, 1014307917869, 38610169465600, 1658751854189100, 63838034769804960, 2687820628008631473, 104236704958533831680, 4335856635102731433604, 169076593322020829272240
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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=3
..0..0..0..3....0..0..1..0....0..0..0..1....0..0..1..0....0..0..0..1
..0..3..1..1....1..0..0..2....0..3..0..3....0..2..3..0....1..0..0..3
..0..2..0..3....2..1..1..3....1..3..3..3....0..1..1..1....1..0..1..2
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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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