A202649 Number of n X n 0..2 arrays with no row or column sum equal to the previous.

3, 52, 8460, 14394092, 231197740500

Offset: 1

Author

R. H. Hardin Dec 22 2011

Keywords

• nonn

Comments

Column 2 of A202651

Examples

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