A209018 Number of nX7 0..3 arrays with no element equal the average of immediate neighbors vertically above, diagonally above and left, and horizontally left of it.

2916, 20918008, 148774643618, 1057701934285612, 7521858792951566188, 53490209804089514438574, 380386826513820237531618354, 2705056288752965649168385141630, 19236551636169391849856640820638184

Offset: 1

Author

R. H. Hardin Mar 04 2012

Keywords

• nonn

Comments

Column 7 of A209019

Examples

			Some solutions for n=4
..1..3..0..1..2..3..2....2..3..1..2..1..2..3....1..3..2..3..0..1..3
..2..0..2..2..1..1..0....3..0..3..3..0..2..3....3..0..0..3..1..3..3
..1..2..2..3..1..0..0....2..1..1..2..1..2..0....2..0..1..2..0..3..0
..3..0..0..1..1..1..3....3..0..3..0..0..2..1....1..2..0..3..0..2..3
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210