A207780 Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 0 and 1 0 1 vertically.

2, 16, 98, 791, 6766, 65094, 786907, 9855231, 142116676, 2459545057, 46309750425, 999589825419, 26202502382134, 768926273969151, 25878896800392858, 1098191860946291476, 52205734467966457603, 2867736141204451650414

Offset: 1

Author

R. H. Hardin Feb 20 2012

Keywords

• nonn

Comments

Diagonal of A207785

Examples

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

Links

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