A183395 Half the number of nX4 binary arrays with no element equal to a strict majority of its knight-move neighbors

8, 8, 69, 156, 451, 2595, 12150, 58407, 280852, 1405171, 7015294, 34368476, 167469177, 825952633, 4089662044, 20170838069, 99218328768, 488970338928, 2413015142592, 11903686509071, 58695278806839, 289412617546604

Offset

1,1

Comments

Column 4 of A183397

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions with a(1,1)=0 for 5X4
..0..0..0..1....0..0..1..1....0..1..0..0....0..1..0..0....0..1..0..1
..1..0..1..1....0..0..1..1....1..1..1..0....1..1..0..0....1..0..1..0
..1..1..0..1....1..0..1..1....0..1..0..0....1..1..0..0....0..0..1..1
..1..0..0..0....0..0..0..1....0..0..0..0....0..0..1..1....0..0..1..1
..0..1..0..1....1..0..1..1....1..1..1..1....0..0..1..1....1..0..1..0

Crossrefs

Sequence in context: A202916 A165426 A341547 * A019216 A020552 A272961

Adjacent sequences: A183392 A183393 A183394 * A183396 A183397 A183398

Keyword

nonn

Author

R. H. Hardin Jan 04 2011

Status

approved