A223151 Number of nX3 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, 12, 96, 788, 3872, 24092, 114824, 665056, 3211640, 17925968, 87559240, 477991060, 2355798592, 12678054948, 62875715760, 335152364948, 1670657735304, 8843353567888, 44252748071720, 233037529994720, 1169694173234480

Offset

1,2

Comments

Column 3 of A223154

Links

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

Example

Some solutions for n=3
..1..1..0....1..0..0....0..1..1....1..1..1....0..1..0....1..1..1....0..1..1
..0..1..1....0..0..0....0..0..0....0..1..1....1..0..0....1..1..0....1..0..0
..1..0..1....1..1..0....0..0..1....0..1..0....0..0..0....1..0..1....1..0..1

Crossrefs

Sequence in context: A038845 A204623 A270568 * A155620 A219438 A219139

Adjacent sequences: A223148 A223149 A223150 * A223152 A223153 A223154

Keyword

nonn

Author

R. H. Hardin Mar 16 2013

Status

approved