A229930 Number of nX4 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value 2-x(i,j).

9, 739, 33119, 1622763, 78416265, 3788842363, 183213209145, 8859387292449, 428371366651425, 20712776154273627, 1001517772189056421, 48426025953836117091, 2341525140459285538795, 113218875141418681649923

Offset: 1

Author

R. H. Hardin, Oct 04 2013

Keywords

• nonn

Comments

Column 4 of A229934

Examples

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

Links

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