A207340 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 1 1 vertically.

2, 16, 84, 828, 9668, 128292, 2367656, 53882188, 1466226618, 53206438448, 2394759800657, 133358534841765, 9689628432751700, 882639945891070144, 101352502023903785258, 15016562984066207345796, 2813722789748877650099592

Offset: 1

Author

R. H. Hardin Feb 17 2012

Keywords

• nonn

Comments

Diagonal of A207346

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..19