A230756 Number of (n+3)X(7+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.

46949808, 90231813552, 194576103540300, 350956390609736652, 645610139671314494208, 1173949802576478433728192, 2135728868490621147879828300, 3882954971416088390717475507468

Offset: 1

Author

R. H. Hardin, Oct 29 2013

Keywords

• nonn

Comments

Column 7 of A230757

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..114