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A223072 Number of nX2 0..2 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, 62, 306, 2888, 17968, 139616, 928600, 6820956, 46372206, 331873366, 2268321228, 16088886806, 110434690210, 779564502166, 5364206977288, 37736564395518, 260073138117054, 1825634354645876, 12597507479843608, 88290795179492360 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A223074

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..33

EXAMPLE

Some solutions for n=3

..0..1....2..1....2..0....0..2....0..2....1..0....2..2....0..2....1..1....1..1

..2..2....0..2....0..2....1..2....0..0....2..0....2..0....1..2....1..2....2..0

..2..1....2..2....0..1....1..1....0..1....0..1....2..1....1..0....2..1....0..1

CROSSREFS

Sequence in context: A100166 A100159 A100160 * A010746 A124995 A020191

Adjacent sequences:  A223069 A223070 A223071 * A223073 A223074 A223075

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 14 2013

STATUS

approved

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Last modified May 26 13:59 EDT 2022. Contains 354092 sequences. (Running on oeis4.)