A197179 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,2,1,0,0 for x=0,1,2,3,4

9, 363, 11424, 367813, 13530178, 467923636, 16686610707, 589208849137, 20885016359231, 739404634476424, 26190742594221192, 927538658235022906, 32851194231582718073, 1163477523647115256949, 41206887402652394051361

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 0's, every 4 is next to 4 0's

Column 7 of A197180

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

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

Crossrefs

Sequence in context: A130558 A132593 A162133 * A373536 A344338 A195888

Adjacent sequences: A197176 A197177 A197178 * A197180 A197181 A197182

Keyword

nonn

Author

R. H. Hardin Oct 11 2011

Status

approved