A201537 Number of nX6 0..2 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.

13, 410, 16393, 983981, 61807736, 3762507339, 208164634003, 10298954399450, 457194210355549, 18377434753379050, 675525914078702215, 22913890806174601101, 722808878339707158532, 21342091118575178714919

Offset: 1

Author

R. H. Hardin Dec 02 2011

Keywords

• nonn

Comments

Column 6 of A201539

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..53