A207515 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 1 0 and 1 0 1 vertically.

2, 16, 98, 1307, 29622, 1048423, 54373655, 4964342828, 715483286848, 161734351034666, 59741686819322041, 35917251659399987384, 34508253720326500890077, 53717705561862882229716065

Offset: 1

Author

R. H. Hardin Feb 18 2012

Keywords

• nonn

Comments

Diagonal of A207519

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..16