A206699 Number of nX7 0..2 arrays avoiding the pattern z-2 z-1 z in any row or column.

1791, 3207681, 4428597297, 6043775871265, 8149739471342829, 10977508218092030949, 14777630573426014735558, 19891697466939518338949937, 26774752595905814904083950218, 36039345751281018973667189182614

Offset: 1

Author

R. H. Hardin Feb 11 2012

Keywords

• nonn

Comments

Column 7 of A206700

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210