A185539 1/6 the number of nX6 0..5 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

41, 127190, 167398110, 295044602325, 468362874353295

Offset: 1

Author

R. H. Hardin Jan 30 2011

Keywords

• nonn

Comments

Column 6 of A185540

Examples

			Some solutions for 3X6 with a(1,1)=0
..0..0..3..4..2..2....0..0..2..2..2..4....0..0..3..1..0..0....0..0..3..5..3..3
..0..3..3..4..4..2....0..3..3..1..2..4....0..3..3..1..3..4....0..3..3..5..2..3
..0..0..0..2..2..2....0..0..0..1..2..2....0..0..0..3..3..4....0..0..0..5..2..2