A183377 Number of nX4 binary arrays with no element equal to the mod 3 sum of its king-move neighbors

3, 20, 68, 225, 627, 2152, 7036, 22392, 74381, 241819, 793240, 2604908, 8530131, 28013101, 91893580, 301557767, 989945590, 3248890744, 10664829792, 35007809686, 114914687393, 377229380984, 1238309771635, 4064987753276

Offset

1,1

Comments

Column 4 of A183380

Links

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

Example

Some solutions for 5X4
..1..1..1..0....1..0..0..0....0..1..0..0....1..0..1..1....0..1..1..0
..0..1..0..1....1..1..1..0....1..0..1..0....1..1..1..0....0..1..1..0
..0..1..1..1....0..0..0..1....1..0..0..1....0..1..1..0....1..1..1..1
..0..0..1..0....1..1..0..1....0..1..0..1....0..1..1..1....1..0..1..0
..0..1..1..0....1..0..1..1....0..0..1..1....1..1..0..0....0..1..1..0

Crossrefs

Sequence in context: A024402 A345689 A292072 * A067600 A348208 A160456

Adjacent sequences: A183374 A183375 A183376 * A183378 A183379 A183380

Keyword

nonn

Author

R. H. Hardin Jan 04 2011

Status

approved