A188560 Number of n X n binary arrays without the pattern 1 1 1 diagonally, vertically or horizontally.

2, 16, 247, 13306, 2109386, 924245906, 1199747927824, 4515869742994831, 49132225919211100127, 1553292806575822383425281, 142435222420745509758550159896, 37880215295994989398957106920807127

Offset: 1

Author

R. H. Hardin Apr 04 2011

Keywords

• nonn

Comments

Diagonal of A188567

Examples

			Some solutions for 3X3
..0..0..0....0..0..1....0..1..1....0..1..1....0..1..0....0..1..1....0..0..1
..1..0..1....0..1..0....0..1..0....1..0..0....0..1..1....0..0..0....1..0..1
..1..0..1....1..0..0....0..0..0....0..1..0....0..0..0....0..0..1....1..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..13