A199126 Number of nX1 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor.

1, 1, 1, 3, 6, 5, 19, 37, 29, 124, 240, 182, 834, 1614, 1198, 5746, 11137, 8142, 40336, 78332, 56620, 287358, 559134, 400598, 2071558, 4038130, 2872754, 15079270, 29443040, 20824778, 110653854, 216379650, 152303410, 817542980, 1600817660

Offset: 1

Author

R. H. Hardin Nov 03 2011

Keywords

• nonn

Comments

Column 1 of A199133

Examples

			All solutions for n=5
..0....0....0....0....0....0
..1....1....1....1....1....1
..2....2....2....0....2....0
..0....1....0....2....1....1
..2....2....1....1....0....2
		

Links

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

Formula

Conjecture: a(3n) = A190917(n). - R. J. Mathar, Nov 01 2015