A183583 Half the number of nX8 0..3 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.

194, 354615, 171459557, 92915045150, 49526167251643, 26548571098836075, 14217486118795912134

Offset: 1

Author

R. H. Hardin Jan 05 2011

Keywords

• nonn

Comments

Column 8 of A183584

Examples

			Some solutions with a(1,1)<=1 for 3X8
..0..0..0..0..1..1..0..0....0..0..0..3..3..0..0..0....0..0..0..0..0..0..3..3
..0..0..0..1..1..1..1..1....0..0..0..0..3..0..0..2....0..0..0..1..0..3..3..3
..0..0..0..1..1..0..0..1....0..0..0..0..3..0..0..2....0..0..0..1..1..1..1..1