A207555 Number of 7Xn 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column, nw-to-se diagonal or ne-to-sw antidiagonal.

1791, 3207681, 3323115736, 3168082336959, 3054158366460488, 2964756265273648883, 2876868686935789680075, 2790347210410991592878863, 2705587415313932036439553600, 2623332913249978851468865268215

Offset: 1

Author

R. H. Hardin Feb 18 2012

Keywords

• nonn

Comments

Row 7 of A207550

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..28