A222451 Number of nX3 0..1 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..1 order.

0, 2, 2, 17, 27, 194, 467, 2375, 6320, 31706, 84949, 426134, 1133626, 5776492, 15176513, 78547862, 204559282, 1071259196, 2775207035, 14655072445, 37875592694, 201114091282, 519500141148, 2768445005172, 7154712147158

Offset: 1

Author

R. H. Hardin Feb 20 2013

Keywords

• nonn

Comments

Column 3 of A222456

Examples

			Some solutions for n=4
..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..0..0....0..1..1....0..0..1....0..0..0....1..1..1....0..0..0....0..0..0
..0..0..0....1..1..1....0..1..1....1..1..1....1..1..1....0..0..0....0..0..1
..1..1..1....1..1..1....1..1..1....1..1..1....1..1..1....1..0..1....1..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210