A231212 Number of (n+1)X(n+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and vertical neighbors, with values 0..2 introduced in row major order.

3, 9, 93, 2892, 226764, 45593903, 23748656906, 31822302958042

Offset: 1

Author

R. H. Hardin, Nov 05 2013

Keywords

• nonn

Comments

Diagonal of A231219

Examples

			Some solutions for n=4
..0..0..0..0..1....0..0..0..1..1....0..0..1..1..2....0..1..1..1..1
..1..1..0..0..1....0..0..0..1..1....0..0..1..1..2....0..1..1..1..1
..1..1..1..1..1....1..1..0..1..1....2..2..2..2..2....0..0..0..0..0
..1..0..0..0..0....1..1..0..0..1....2..2..0..0..0....0..1..1..0..0
..1..0..0..0..0....1..1..0..0..1....2..2..0..0..0....0..1..1..0..0