A197316 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,1,1,0,0 for x=0,1,2,3,4.

2, 27, 249, 2724, 24903, 189212, 2241018, 20425821, 208960627, 1984221109, 20223402011, 195734767851, 1964217477394, 19163046359315, 191509608470344, 1875354477655910, 18682249962661264, 183413216662448071

Offset: 1

Author

R. H. Hardin Oct 13 2011

Keywords

• nonn

Comments

Every 0 is next to 0 0's, every 1 is next to 1 1'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 7 of A197317

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..109