A184466 Half the number of (n+1)X9 binary arrays with equal numbers of majority one 2X2 subblocks and majority zero 2X2 subblocks.

16809, 5002165, 2002023718, 873679701315, 396770571117114, 184478487695574108, 87131390011496951676, 41619801566809753837565, 20050042433422012129360190, 9723279387982947487498511078

Offset: 1

Author

R. H. Hardin Jan 15 2011

Keywords

• nonn

Comments

Column 8 of A184467

Examples

			Some solutions for 3X9
..0..0..1..1..1..1..1..0..0....0..0..1..1..0..1..1..1..0
..0..0..0..1..0..0..1..1..1....0..0..0..1..0..0..1..1..0
..0..0..1..1..0..0..0..0..1....0..0..0..1..1..1..0..1..0
...
...M..M..P..P..E..P..P..E.......M..M..P..E..M..P..P..E...
...M..M..P..E..M..M..E..P.......M..M..E..P..E..E..P..E...
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..18