A183582 Half the number of n X 7 0..3 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.

80, 65277, 14823037, 3724940988, 922710498351, 229716738097391, 57140106100076100, 14217486118795912134

Offset: 1

Author

R. H. Hardin, Jan 05 2011

Keywords

• nonn
• more

Examples

			Some solutions with a(1,1)<=1 for 3 X 7:
..0..0..0..2..2..0..0....0..0..0..1..1..0..0....0..0..0..2..2..0..0
..0..0..0..0..2..0..0....0..0..1..1..1..1..1....0..0..0..0..0..0..3
..0..1..1..1..1..3..3....0..0..0..2..2..1..1....0..1..1..0..3..3..3
		

Crossrefs

Column 7 of A183584.