A207494 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 0 0 vertically.

2, 16, 102, 1004, 14253, 237576, 5715255, 163471950, 6200122170, 294261603282, 17977383927693, 1375335087129521, 138833395825965196, 17233401412131428885, 2924391663494366576782, 600552802391087361313757

Offset: 1

Author

R. H. Hardin Feb 18 2012

Keywords

• nonn

Comments

Diagonal of A207500

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..18