A241135 Number of nX4 0..2 arrays with no element equal to the same number of vertical neighbors as horizontal neighbors, with new values 0..2 introduced in row major order.

2, 17, 152, 1670, 19619, 238607, 2939027, 36470565, 454209512, 5665536042, 70725144550, 883230404813, 11031990457193, 137807268659287, 1721508492588267, 21505781617159089, 268661629731046770

Offset: 1

Author

R. H. Hardin, Apr 16 2014

Keywords

• nonn

Comments

Column 4 of A241138

Examples

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

Links

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