A188752 Number of 7Xn binary arrays without the pattern 1 1 1 diagonally, vertically or antidiagonally.

81, 6561, 289776, 15398676, 828466161, 43558358008, 2307086087740, 122293738629021, 6476421031528420, 343061756270359870, 18173221774555803823, 962672885162309091074, 50995334218704721900811

Offset: 1

Author

R. H. Hardin Apr 09 2011

Keywords

• nonn

Comments

Row 7 of A188747

Examples

			Some solutions for 7X3
..0..1..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..1....0..0..0
..0..0..0....1..1..1....1..1..1....0..0..0....0..1..1....0..1..0....1..1..1
..1..1..0....1..0..1....0..1..1....1..1..0....0..0..0....0..1..1....0..0..0
..0..0..0....0..0..0....0..0..0....0..0..0....0..1..0....0..0..0....0..1..1
..0..0..0....0..0..0....0..0..0....0..1..1....1..1..0....0..1..0....1..1..0
..0..0..1....0..0..0....0..1..0....1..0..0....0..0..1....0..0..1....0..0..0
..1..0..1....1..0..0....1..1..1....0..0..0....1..1..1....0..0..0....0..1..1
		

Links

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