Search: a222953 -id:a222953
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A222951
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Number of nX3 0..3 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope
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+10
3
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0, 2256, 125664, 8579208, 436075392, 25670781880, 1318401732192, 74325398290456, 3851979765811744, 213021713761427836, 11107559755380176496, 607834111663512093200, 31825816417857647397600, 1730405083684853119755316
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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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....1..2..0....2..3..1....2..3..3....1..2..3....2..1..1....0..2..1
..2..2..1....1..3..2....3..0..0....2..2..0....3..2..2....2..2..2....2..0..0
..0..3..0....3..3..2....1..0..1....0..3..2....3..3..0....1..1..3....1..2..2
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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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A222950
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Number of nX2 0..3 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope
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+10
1
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0, 212, 2256, 36302, 455904, 6471572, 84040156, 1156716696, 15178933676, 206025068636, 2712435820392, 36611998287306, 483144415956072, 6500119089674696, 85910716717515264, 1153267214849914148
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=3
..3..3....2..2....2..1....2..3....3..1....1..1....2..1....1..0....2..0....3..0
..2..1....1..2....3..3....3..1....3..3....1..2....2..2....0..0....2..2....3..1
..0..3....1..3....1..2....1..0....0..1....1..3....2..0....0..2....2..1....3..3
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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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A222952
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Number of nX4 0..3 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope
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+10
0
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OFFSET
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1,2
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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..0..2..2....3..2..2..0....3..0..0..2....1..0..0..3....0..2..2..2
..1..2..2..0....3..0..0..3....0..0..0..0....3..0..2..1....3..0..2..3
..3..2..2..0....0..0..2..3....2..0..2..1....2..0..2..1....2..0..2..1
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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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