A185822 1/5 the number of nX6 0..4 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

29, 49248, 35446376, 32995092992, 28043363244452

Offset: 1

Author

R. H. Hardin Feb 05 2011

Keywords

• nonn

Comments

Column 6 of A185825

Examples

			Some solutions for 4X6 with a(1,1)=0
..0..0..1..1..4..4....0..0..2..2..0..0....0..0..4..4..2..2....0..0..0..3..2..3
..0..1..0..2..2..4....0..1..0..0..0..1....0..1..0..4..1..2....0..1..0..3..2..3
..0..1..0..2..0..2....0..1..0..2..1..1....0..1..0..2..1..2....0..1..0..2..4..4
..0..0..0..2..0..2....0..0..0..2..4..4....0..0..0..2..3..3....0..0..0..2..4..4