A197887 Number of nX6 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

1, 43, 196, 2263, 17890, 129294, 1134527, 9389938, 74334188, 612587633, 4957017898, 40458420396, 328259829544, 2682720603080, 21878875862100, 178129467799644, 1450139820586951, 11818051611475707, 96281373184386270

Offset

1,2

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 6 of A197889

Links

R. H. Hardin, Table of n, a(n) for n = 1..184

Example

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

Crossrefs

Sequence in context: A309905 A142115 A141941 * A342509 A145650 A142527

Adjacent sequences: A197884 A197885 A197886 * A197888 A197889 A197890

Keyword

nonn

Author

R. H. Hardin Oct 19 2011

Status

approved