A222374 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.

1, 5, 9, 118, 498, 8111, 37107, 676485, 3140167, 58995438, 275054103, 5223616489, 24395423052, 466212749842, 2180168118272, 41855166855421, 195981171753608, 3775984650279490, 17703134058396750, 342076192235557748

Offset: 1

Author

R. H. Hardin Feb 17 2013

Keywords

• nonn

Comments

Column 3 of A222378

Examples

			Some solutions for n=4
..0..1..0....0..0..0....0..0..1....0..0..0....0..0..0....0..0..1....0..0..0
..0..0..0....1..0..0....2..2..2....0..0..0....0..0..0....1..1..1....0..0..0
..0..0..0....1..1..1....2..2..2....0..0..1....1..0..0....1..1..1....0..1..0
..0..0..0....1..1..1....2..2..2....0..0..1....1..0..0....1..1..1....1..0..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..130