A223039 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

11, 1265, 229437, 42964721, 8206670940, 1590576924149, 311543161837482, 61504928367575855, 12217149892788877445, 2438751075983097268086, 488783777099597628446445, 98294363180577784998680559

Offset: 1

Author

R. H. Hardin Mar 12 2013

Keywords

• nonn

Comments

Column 4 of A223041

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..23