A230169 Number of n X n 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value 2-x(i,j).

0, 27, 3787, 4722977, 49754476927, 4381081731832923, 3274958849115023706081

Offset: 1

Author

R. H. Hardin, Oct 11 2013

Keywords

• nonn

Comments

Diagonal of A230176

Examples

			Some solutions for n=3
..1..0..0....0..2..1....0..0..1....1..0..2....1..1..0....0..0..2....2..1..1
..1..2..0....1..2..1....2..0..1....1..0..2....1..0..2....2..1..2....2..0..1
..2..0..2....1..0..0....1..1..2....1..1..0....1..2..2....0..1..1....0..2..1