A185832 Half the number of nX6 binary arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

5, 162, 1430, 11789, 98975, 923808, 7678409, 68363184, 593948668, 5187350050, 45205777641, 395015488029, 3443605978936, 30060887575003, 262260968830996, 2288567378102476, 19968587237909055, 174246131512755338

Offset: 1

Author

R. H. Hardin Feb 05 2011

Keywords

• nonn

Comments

Column 6 of A185835

Examples

			Some solutions for 4X6 with a(1,1)=0
..0..1..1..1..1..1....0..0..1..1..1..0....0..0..0..1..1..0....0..0..0..1..1..1
..0..0..0..0..0..1....0..1..0..0..1..0....0..1..1..1..0..0....0..1..1..0..0..0
..1..1..1..1..1..1....0..1..0..0..1..0....0..1..0..0..1..1....1..0..1..0..1..0
..0..0..0..0..0..0....0..0..1..1..0..0....0..1..1..0..0..1....1..0..1..0..1..0
		

Links

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