A183553 Number of nX8 0..2 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.

129, 113841, 33169105, 10339213765, 3221377019429, 1003889179688773, 313000943874975793, 97587614786720584857

Offset: 1

Author

R. H. Hardin Jan 05 2011

Keywords

• nonn

Comments

Column 8 of A183554

Examples

			Some solutions for 3X8
..0..0..0..2..2..1..2..2....0..0..0..0..1..0..2..2....0..0..0..1..1..0..0..0
..0..0..0..2..2..1..1..2....0..0..0..1..1..0..0..2....0..0..0..0..0..0..0..0
..0..0..0..2..2..2..1..2....0..0..0..0..1..1..0..0....0..0..0..2..2..2..2..0