A183475 Number of n X n 0..2 arrays with every element equal to either the sum mod 3 of its vertical neighbors or the sum mod 3 of its horizontal neighbors

1, 15, 117, 4015, 706473, 116198719, 84056287173

Offset

1,2

Comments

Diagonal of A183483

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for 4X4
..0..1..1..0....0..0..0..0....2..0..1..0....2..1..2..1....0..0..2..2
..0..0..0..0....1..0..0..0....2..0..1..0....2..0..1..1....2..0..0..0
..2..0..1..2....1..0..0..1....0..0..0..0....0..0..0..0....2..0..0..0
..2..0..1..2....0..0..0..1....1..1..0..0....0..2..2..0....0..0..0..0

Crossrefs

Sequence in context: A126510 A328725 A331211 * A253804 A161476 A162321

Adjacent sequences: A183472 A183473 A183474 * A183476 A183477 A183478

Keyword

nonn

Author

R. H. Hardin Jan 05 2011

Status

approved