A184561 Number of (n+1)X7 0..2 arrays with no 2X2 subblock summing to less than 4.

603249, 390354307, 203570564774, 115000791536877, 63392707611948281, 35245029137091490532, 19540724845064600039882, 10844219595929643673506107, 6016136514697924805072162487, 3337980836583341810657426070927

Offset: 1

Author

R. H. Hardin Jan 17 2011

Keywords

• nonn

Comments

Column 6 of A184564

Examples

			Some solutions for 3X7
..0..0..0..2..0..2..0....0..0..0..2..1..1..2....0..0..0..2..0..2..2
..2..2..2..0..2..2..0....2..2..2..0..2..2..0....2..2..2..0..2..1..2
..2..0..0..2..0..1..1....1..0..2..1..1..1..2....0..0..1..2..2..2..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200