A184563 Number of (n+1)X9 0..2 arrays with no 2X2 subblock summing to less than 4.

25680486, 102644935902, 307926979784837, 1027803541995894568, 3319239109051464012589, 10844219595929643673506107, 35294057223652471936332160677, 115019923806287297509943176811916

Offset: 1

Author

R. H. Hardin Jan 17 2011

Keywords

• nonn

Comments

Column 8 of A184564

Examples

			Some solutions for 3X9
..0..0..0..0..0..0..2..2..2....0..0..0..0..0..0..2..0..2
..2..2..2..2..2..2..1..2..1....2..2..2..2..2..2..2..2..1
..0..0..0..0..2..0..2..1..2....0..0..0..0..2..2..1..0..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..50