A198183 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,2,1,0,0 for x=0,1,2,3,4.

1, 21, 148, 883, 8298, 51688, 395340, 2639341, 19059216, 135044844, 958174742, 6800519266, 48283678834, 342710822044, 2431565681788, 17263106688089, 122543913785532, 869732001977147, 6173405546650902, 43819646823646105

Offset: 1

Author

R. H. Hardin Oct 21 2011

Keywords

• nonn

Comments

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

Column 6 of A198185

Examples

			Some solutions containing all values 0 to 4 for n=4
..2..1..0..3..0..1....1..2..0..3..0..1....0..2..1..0..3..0....2..1..1..2..1..0
..1..0..4..0..3..2....0..1..3..0..3..2....1..1..0..4..0..1....1..0..3..0..1..2
..0..3..0..4..0..1....2..1..0..4..0..1....2..0..3..0..3..2....0..3..0..4..0..1
..1..2..1..0..3..0....1..0..3..0..3..0....1..1..2..1..0..1....1..2..1..0..3..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..199