A208386 Number of n X n 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.

1, 14, 3042, 5800644, 93120350760, 12599441934740388, 14365030966055594634024, 138014735764906572120867370968, 11173919983811965361047734248948606160, 7623374241518340770502859232163385538378521776

Offset: 1

Author

R. H. Hardin Feb 25 2012

Keywords

• nonn

Comments

Diagonal of A208392

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..13