A185770 Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.

81, 7074, 2046098, 2171002788, 7861640359954

Offset: 1

Author

R. H. Hardin Feb 03 2011

Keywords

• nonn

Comments

Diagonal of A185777

Examples

			Some solutions for 3X3
..2..1..2....0..0..1....2..0..0....2..1..1....1..2..1....1..1..0....2..1..1
..0..2..2....1..1..2....1..1..0....2..0..1....0..1..2....1..0..0....0..0..0
..0..1..0....0..1..1....2..2..1....1..1..0....2..0..1....2..1..1....0..2..2