A196849 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,1,0,2,4 for x=0,1,2,3,4.

1, 11, 206, 16876, 4326720, 3805929995, 11300853019444, 113522093851497024

Offset: 1

Author

R. H. Hardin Oct 06 2011

Keywords

• nonn

Comments

Every 0 is next to 0 3's, every 1 is next to 1 1's, every 2 is next to 2 0's, every 3 is next to 3 2's, every 4 is next to 4 4's

Diagonal of A196856

Examples

			Some solutions for n=4
..0..0..0..0....0..0..1..1....0..0..0..2....0..1..1..0....0..0..0..0
..2..0..0..2....0..0..0..0....2..0..0..0....0..0..0..0....0..0..1..1
..1..1..0..1....2..2..2..1....2..0..2..2....2..1..2..1....1..1..2..0
..0..0..0..1....0..0..0..1....0..1..1..0....0..1..0..1....0..0..0..0