A231841 Number of 3Xn 0..3 arrays with no element less than a strict majority of its horizontal and antidiagonal neighbors.

64, 422, 4508, 52411, 678660, 8887871, 114873933, 1472320155, 18811450866, 240333888755, 3072777642636, 39304807956686, 502807539383400, 6431904732538361, 82273333965692552, 1052378549019652099

Offset: 1

Author

R. H. Hardin, Nov 14 2013

Keywords

• nonn

Comments

Row 3 of A231839

Examples

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

Links

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