A208862 Number of nX6 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or left-upward diagonal neighbors.

187, 315203, 607924387, 1179377179523, 2289701830963879, 4445765748006060562, 8632160191264007914496, 16760735467624113550972052, 32543685580973709708760951442, 63188843847651604770766546682829

Offset: 1

Author

R. H. Hardin Mar 02 2012

Keywords

• nonn

Comments

Column 6 of A208864

Examples

			Some solutions for n=4
..0..1..0..0..2..2....0..0..0..0..0..1....0..0..0..0..0..0....0..0..0..0..0..0
..1..2..1..1..3..3....0..1..2..1..3..2....0..1..1..1..2..1....1..2..1..1..1..3
..0..3..3..0..1..0....1..3..0..3..1..0....0..1..0..2..3..1....1..3..3..2..2..3
..2..1..1..2..1..2....2..1..0..3..0..3....0..3..1..0..1..0....0..1..0..0..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..136