A231743 Number of nX4 0..3 arrays with no element less than a strict majority of its horizontal and vertical neighbors.

50, 1328, 60806, 2154900, 71742015, 2426463539, 82701946547, 2814528154294, 95747933760688, 3259127333943936, 110951853201769471, 3776779941421524009, 128555070606110236059, 4375838168986252858545, 148948822494411349242405

Offset: 1

Author

R. H. Hardin, Nov 13 2013

Keywords

• nonn

Comments

Column 4 of A231746

Examples

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

Links

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