A199645 Number of nX6 0..2 arrays with values 0..2 introduced in row major order and each element equal to one or two horizontal and vertical neighbors.

6, 1384, 134748, 15066222, 1614250077, 176701683386, 19161971644783, 2085499380111100, 226676302441401393, 24649864713781053665, 2680046304287719376722, 291407720701800854792287

Offset: 1

Author

R. H. Hardin Nov 08 2011

Keywords

• nonn

Comments

Column 6 of A199647

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..30