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

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

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: A219917 A257039 A337076 * A380244 A333258 A370976

Adjacent sequences: A223147 A223148 A223149 * A223151 A223152 A223153

Keyword

nonn

Author

R. H. Hardin Mar 16 2013

Status

approved