A240654 Number of nX6 0..1 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..1 introduced in row major order.

1, 10, 136, 1545, 16629, 184819, 2076117, 23697768, 272201307, 3137010024, 36217287513, 418547014847, 4839698233313, 55979951123885, 647628362479276, 7493125930415564, 86701026167433662, 1003225793066345318

Offset: 1

Author

R. H. Hardin, Apr 09 2014

Keywords

• nonn

Comments

Column 6 of A240656

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210