A197885 Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,2,1,1,1 for x=0,1,2,3,4.

2, 14, 47, 155, 835, 2263, 10827, 38938, 157178, 654028, 2607334, 10482745, 41930639, 169374587, 686689100, 2793219587, 11244612740, 45359859580, 183328706973, 742423862981, 3008747408411, 12158966386525, 49114866456717

Offset: 1

Author

R. H. Hardin Oct 19 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 1's, every 4 is next to 4 1's

Column 4 of A197889

Examples

			Some solutions containing all values 0 to 4 for n=5
..2..1..0..1....2..1..1..2....2..1..1..2....0..1..2..1....0..1..1..2
..1..3..1..2....1..4..1..1....1..1..4..1....2..1..3..1....1..2..0..1
..0..2..1..0....0..1..2..0....0..2..1..0....1..4..1..2....0..2..1..3
..1..1..4..1....2..1..0..1....1..3..1..2....0..1..1..0....1..1..4..1
..2..1..1..2....1..3..1..2....2..1..3..1....1..2..2..1....2..1..1..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210