A206893 Number of 7Xn 0..1 arrays avoiding 0 1 0 horizontally and 1 0 0 vertically.

54, 2916, 82807, 2070564, 57268342, 1648854501, 47015346159, 1328156697136, 37521598580023, 1061970530807292, 30067564211434697, 851046751948225835, 24085315991411166967, 681659412649184727059, 19292878589062169424679

Offset: 1

Author

R. H. Hardin Feb 13 2012

Keywords

• nonn

Comments

Row 7 of A206889

Examples

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

Links

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