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A223150 Number of nX2 0..1 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, 10, 12, 66, 108, 402, 876, 2754, 6348, 18122, 43660, 119970, 293196, 786930, 1963628, 5195330, 13008844, 34140458, 85957676, 224448290, 567203884, 1475618386, 3735881132, 9694028482, 24581846668, 63682969994, 161696209356 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A223154

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..72

EXAMPLE

Some solutions for n=3

..0..0....0..0....0..1....1..0....0..1....1..1....1..0....0..1....0..1....1..1

..0..1....1..0....1..1....0..0....1..0....1..0....0..1....1..0....0..0....0..1

..1..0....0..1....1..0....0..1....0..0....0..1....0..0....1..1....1..0....1..0

CROSSREFS

Sequence in context: A242508 A219917 A257039 * A241252 A301905 A167321

Adjacent sequences:  A223147 A223148 A223149 * A223151 A223152 A223153

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 16 2013

STATUS

approved

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Last modified February 26 21:53 EST 2020. Contains 332295 sequences. (Running on oeis4.)