A197543 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,2,1,1,1 for x=0,1,2,3,4

6, 58, 121, 834, 2095, 12019, 48014, 225222, 831160, 3944345, 16773428, 72763421, 300929135, 1319535052, 5704373966, 24566253078, 104395539577, 449962758422, 1938348799951, 8344538708719, 35799140191716, 153820463246984

Offset

1,1

Comments

Every 0 is next to 0 2'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 6 of A197545

Links

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

Example

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

Crossrefs

Sequence in context: A034218 A034237 A291628 * A184708 A004301 A223030

Adjacent sequences: A197540 A197541 A197542 * A197544 A197545 A197546

Keyword

nonn

Author

R. H. Hardin Oct 16 2011

Status

approved