A231742 Number of nX3 0..3 arrays with no element less than a strict majority of its horizontal and vertical neighbors.

16, 318, 4430, 60806, 784076, 9945132, 126926437, 1625269595, 20795246129, 265933115701, 3401419933047, 43511214955897, 556577494538011, 7119285135911590, 91064607669052460, 1164839484230300582

Offset: 1

Author

R. H. Hardin, Nov 13 2013

Keywords

• nonn

Comments

Column 3 of A231746

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 87

Formula

Empirical recurrence of order 87 (see link above)