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A223743
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Number of nX1 0..2 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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2
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3, 3, 9, 9, 39, 43, 195, 243, 1209, 1539, 8007, 10557, 56277, 75595, 409431, 558117, 3061119, 4218077, 23357223, 32466849, 181185495, 253624579, 1424453499, 2005655781, 11325017397, 16024596491, 90896159565, 129159081787
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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=6
..2....0....1....1....2....0....2....2....1....0....2....0....1....1....1....0
..1....1....1....1....1....1....2....0....0....2....1....2....2....0....2....1
..0....2....0....2....0....2....0....1....2....2....1....1....1....2....2....1
..0....2....2....0....2....0....0....1....1....2....1....2....2....2....0....1
..1....1....2....0....2....0....2....0....2....2....1....0....0....0....1....1
..2....0....0....2....1....1....2....2....0....0....2....1....2....1....2....0
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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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