A188565 Number of nX7 binary arrays without the pattern 1 1 1 diagonally, vertically or horizontally.

81, 6561, 237116, 11433452, 550371695, 25507294349, 1199747927824, 56394861720488, 2646119200975135, 124263900074691604, 5835027374030395082, 273966247390359990893, 12864061918841330330771, 604024661760799430803651

Offset: 1

Author

R. H. Hardin Apr 04 2011

Keywords

• nonn

Comments

Column 7 of A188567

Examples

			Some solutions for 3X7
..0..0..0..1..0..0..0....0..0..0..0..0..0..1....0..0..1..0..1..0..1
..0..0..1..0..1..1..0....0..0..0..0..1..0..0....0..0..1..0..0..1..0
..1..0..1..0..0..0..0....0..0..1..0..1..1..0....1..1..0..0..0..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200