A183552 Number of nX7 0..2 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.

63, 25785, 3721925, 569461759, 87176303417, 13344696858771, 2043774880960645, 313000943874975793, 47935484320796681363, 7341240634658342843595, 1124298676282804824274345, 172184481387904369618417369

Offset: 1

Author

R. H. Hardin Jan 05 2011

Keywords

• nonn

Comments

Column 7 of A183554

Examples

			Some solutions for 3X7
..0..0..1..1..1..1..2....0..0..2..2..2..2..1....0..0..1..0..0..0..2
..0..0..1..0..2..2..2....0..0..0..2..2..1..1....0..0..1..1..1..0..2
..0..0..1..0..2..2..2....0..0..2..2..2..2..2....0..0..0..0..1..0..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..18