A197886 Number of nX5 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, 18, 77, 835, 2730, 17890, 92843, 567991, 3000116, 17111462, 94740977, 537643352, 2995145891, 16728999681, 93489922434, 524952952537, 2940191924830, 16425787144594, 91861015115420, 514650900540840, 2882700958009902

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 5 of A197889

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
..2..1..0..1..2....1..2..2..1..0....1..2..2..1..1....2..1..0..1..2
..1..0..2..1..1....0..1..1..1..2....0..1..1..0..2....1..0..2..1..1
..1..3..1..4..1....2..1..4..1..1....2..1..4..1..1....3..1..1..4..1
..2..1..0..1..2....1..3..1..2..0....1..3..1..2..0....1..2..0..1..2

Crossrefs

Sequence in context: A164603 A229714 A100187 * A039453 A342560 A219144

Adjacent sequences: A197883 A197884 A197885 * A197887 A197888 A197889

Keyword

nonn

Author

R. H. Hardin Oct 19 2011

Status

approved