A222505 Number of nX4 0..1 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

3, 3, 15, 84, 497, 2862, 15420, 86570, 484976, 2751326, 15597305, 89022483, 508390703, 2915183250, 16739260404, 96360825455, 555513635334, 3208071753051, 18550893260858, 107413402302763, 622649366897782, 3613180083184007

Offset: 1

Author

R. H. Hardin Feb 23 2013

Keywords

• nonn

Comments

Column 4 of A222509

Examples

			Some solutions for n=3
..0..0..1..1....0..0..1..1....0..0..0..0....0..0..0..0....0..0..0..0
..1..1..1..1....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..1..1..1..1....0..0..0..0....1..1..0..0....0..1..0..1....0..0..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..177