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A223160
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Number of nX1 0..3 arrays with every row and column least squares fitting to a nonnegative slope straight line, with a single point array taken as having zero slope
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1
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4, 10, 40, 139, 568, 2134, 8724, 33639, 136904, 534276, 2166472, 8510509, 34420568, 135769884, 548080716, 2167856618, 8738893896, 34633415528, 139459394648, 553500106331, 2226881681120, 8848085247670, 35573691960864, 141468339347027
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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
..1....0....0....2....0....0....0....2....2....2....1....0....1....1....0....1
..2....2....1....2....1....2....3....3....1....1....0....2....1....1....3....1
..1....2....1....3....3....3....1....3....2....3....2....1....3....2....0....1
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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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