A183576 Half the number of n X n 0..3 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors.

0, 14, 814, 240358, 320224986, 1988200387149, 57140106100076100

Offset: 1

Author

R. H. Hardin Jan 05 2011

Keywords

• nonn

Comments

Diagonal of A183584

Examples

			Some solutions with a(1,1)<=1 for 3X3
..0..3..3....0..0..3....1..1..3....1..1..0....1..3..0....1..2..2....1..1..1
..0..3..0....0..3..3....1..1..3....1..0..0....1..3..0....1..1..1....1..1..1
..0..3..0....0..0..3....3..3..3....1..0..0....1..3..0....3..3..3....1..2..2