A183369 Number of n X n binary arrays with no element equal to the mod 3 sum of its diagonal and antidiagonal neighbors.

1, 4, 6, 49, 195, 3969, 285516, 22743361, 3414837564, 1467194393284, 1549197261403648, 3156509484479021584, 11694530363878786782540, 91853775938916496321710336

Offset: 1

Author

R. H. Hardin Jan 04 2011

Keywords

• nonn

Comments

Diagonal of A183374

Examples

			Some solutions for 5X5
..1..1..0..1..0....0..1..0..0..0....0..1..0..0..1....0..0..1..1..0
..0..0..0..1..0....1..1..1..1..0....0..1..0..0..1....1..1..0..1..0
..0..1..1..1..1....0..1..0..1..0....1..1..1..0..0....1..0..0..1..1
..0..1..0..1..0....0..0..1..0..1....0..1..0..1..1....1..1..0..1..0
..0..1..1..1..0....1..0..1..1..1....0..1..1..0..0....0..0..1..1..0