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A223821
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Number of nX4 0..3 arrays with every row and column least squares fitting to a zero slope straight line, with a single point array taken as having zero slope
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0
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22, 22, 484, 744, 25080, 45000, 2551604, 4923882, 362643556, 760921872, 67380659016, 143668888998, 14708225919640, 31720212766700, 3619610990119432
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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
..0..3..0..1....0..3..3..0....2..0..0..2....0..3..0..1....3..3..3..3
..1..1..1..1....3..0..0..3....3..3..3..3....1..3..3..1....2..0..0..2
..1..1..1..1....3..0..0..3....3..0..0..3....1..3..3..1....2..3..3..2
..0..3..0..1....0..3..3..0....2..1..1..2....0..3..0..1....3..2..2..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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