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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 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

CROSSREFS

Sequence in context: A235180 A114880 A200433 * A232671 A082828 A254704

Adjacent sequences:  A222947 A222948 A222949 * A222951 A222952 A222953

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 10 2013

STATUS

approved

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Last modified September 16 16:40 EDT 2021. Contains 347473 sequences. (Running on oeis4.)