A230755 Number of (n+3)X(6+3) 0..2 arrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.

4120752, 3423037464, 3154520054700, 2446111719135732, 1928867953682733132, 1504181314566629793432, 1173949802576478433728192, 915433809414452667025137888, 713802193109443984513638090432

Offset: 1

Author

R. H. Hardin, Oct 29 2013

Keywords

• nonn

Comments

Column 6 of A230757

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..189