A183521 Number of nX4 0..2 arrays with each element equal to either the sum mod 3 of its horizontal and vertical neighbors or the sum mod 3 of its diagonal and antidiagonal neighbors.

7, 95, 543, 3507, 27609, 201833, 1521573, 11678037, 89238523, 683029435, 5235031077, 40141122349, 307807564417, 2360732530937, 18105826441313, 138867315400205, 1065099011259479, 8169267911756541, 62658120915577663

Offset: 1

Author

R. H. Hardin Jan 05 2011

Keywords

• nonn

Comments

Column 4 of A183526

Examples

			Some solutions for 3X4
..2..1..2..1....2..1..0..1....1..1..2..2....2..1..0..0....0..0..2..0
..1..1..0..2....2..2..1..0....0..1..2..0....1..2..2..0....1..0..2..1
..1..2..0..2....1..2..2..1....1..1..2..2....0..2..0..2....2..1..2..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200