A208063 Number of n X n 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 0 1 1 vertically.

2, 16, 72, 576, 3696, 26244, 198000, 1638400, 12913840, 117722500, 1052059680, 10059287616, 97769309736, 1020075760144, 10507456855392, 116747852120064, 1295601058976256, 15148523442518244, 177995312325281880

Offset: 1

Author

R. H. Hardin Feb 23 2012

Keywords

• nonn

Comments

Diagonal of A208069

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..32