A222289 Number of nX7 0..1 arrays with exactly floor(nX7/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order

5, 144, 1427, 40321, 564838, 17801910, 262048125, 8550246097, 129184703815, 4294346570524, 66002018148195, 2218403489369930, 34478463977532598, 1167416501197133512, 18284642742630658357, 622321211264493492467

Offset

1,1

Comments

Column 7 of A222290

Links

R. H. Hardin, Table of n, a(n) for n = 1..24

Example

Some solutions for n=4
..0..1..0..1..1..1..1....0..0..0..0..0..0..0....0..0..1..1..1..1..1
..1..1..1..0..1..1..1....0..0..0..1..0..1..0....0..1..0..1..1..1..1
..1..1..1..0..1..1..1....0..0..1..0..0..0..0....1..1..0..0..1..1..1
..1..1..0..1..1..1..1....0..0..0..1..0..0..0....1..1..0..1..1..1..1

Crossrefs

Sequence in context: A171776 A277401 A208874 * A134503 A282836 A320414

Adjacent sequences: A222286 A222287 A222288 * A222290 A222291 A222292

Keyword

nonn

Author

R. H. Hardin Feb 14 2013

Status

approved