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Search: a222953 -id:a222953
Displaying 1-3 of 3 results found.
page 1
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A222950
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
+0
1
0, 212, 2256, 36302, 455904, 6471572, 84040156, 1156716696, 15178933676, 206025068636, 2712435820392, 36611998287306, 483144415956072, 6500119089674696, 85910716717515264, 1153267214849914148
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 2 of A222953
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..24
EXAMPLE
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 10 2013
STATUS
approved
A222951
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
+0
3
0, 2256, 125664, 8579208, 436075392, 25670781880, 1318401732192, 74325398290456, 3851979765811744, 213021713761427836, 11107559755380176496, 607834111663512093200, 31825816417857647397600, 1730405083684853119755316
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 3 of A222953
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..15
EXAMPLE
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 10 2013
STATUS
approved
A222952
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
+0
0
0, 36302, 8579208, 3084748094, 690124074740, 194406198823968, 44586928533264392
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 4 of A222953
LINKS
Table of n, a(n) for n=1..7.
EXAMPLE
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 10 2013
STATUS
approved
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