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A223070
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Number of nX3 0..3 arrays with successive rows and columns fitting to straight lines with nondecreasing slope, with a single point array taken as having zero slope
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1
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64, 1080, 38512, 899390, 22520656, 462313688, 9567328752, 178464221290, 3336648010448, 58641450033936, 1033599371410096, 17499076161248060, 297470720803662048, 4917593684170711306, 81699455573347788176
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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
..2..2..2....0..0..0....3..2..0....2..0..0....0..0..0....3..3..1....2..0..2
..1..0..2....1..0..2....0..2..1....1..1..3....1..2..3....1..0..1....1..2..2
..1..3..3....2..2..3....0..3..2....0..2..2....0..2..3....0..1..3....0..0..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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