A207523 Number of 7Xn 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 1 0 and 1 0 1 vertically.

42, 1764, 12994, 101233, 991184, 7666319, 54373655, 406281454, 2956097240, 20771578816, 146736632823, 1035899791894, 7243867291833, 50585923578789, 353460807485988, 2464610891088612, 17167716757793554, 119597858516828559

Offset: 1

Author

R. H. Hardin Feb 18 2012

Keywords

• nonn

Comments

Row 7 of A207519

Examples

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

Links

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