A183825 1/256 the number of (n+1)X7 0..3 arrays with no 2X2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.

759375, 6954559893, 62851591581012, 570213177028325955, 5167876666358771202411

Offset: 1

Author

R. H. Hardin Jan 07 2011

Keywords

• nonn

Comments

Column 6 of A183827

Examples

			Some solutions with upper left block zero for 3X7
..0..0..2..0..0..0..3....0..0..0..0..1..0..0....0..0..0..0..1..0..2
..0..0..2..2..0..0..0....0..0..3..2..0..0..1....0..0..1..2..0..0..1
..2..0..1..0..1..0..0....2..0..1..0..2..0..2....1..0..3..0..3..0..0