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A223306
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Number of nX3 0..2 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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9, 36, 324, 1845, 17343, 119660, 1139787, 8607060, 81980208, 654895692, 6214786587, 51174096165, 483028282800, 4058363367764, 38087602931007, 324428475860991, 3027965859096579, 26044772393542375, 242002470580757595
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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..1..2....0..1..2....0..2..2....0..2..1....1..1..2....0..1..1....0..0..2
..1..2..2....1..1..2....0..1..1....0..0..2....1..1..2....0..2..2....0..1..2
..0..1..2....0..2..2....0..2..2....1..2..2....1..2..2....0..1..1....0..2..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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