A197241 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,2,1,2 for x=0,1,2,3,4

1, 73, 1637, 32754, 750414, 16248436, 352842084, 7724652441, 168523962450, 3676078979774, 80239901730427, 1751188373419046, 38215194111617673, 833983549405202297, 18200567290517388113, 397200129894815516422

Offset

1,2

Comments

Every 0 is next to 0 4's, every 1 is next to 1 3's, every 2 is next to 2 2's, every 3 is next to 3 1's, every 4 is next to 4 2's

Column 7 of A197242

Links

R. H. Hardin, Table of n, a(n) for n = 1..171

Example

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

Crossrefs

Sequence in context: A056214 A197216 A197502 * A332948 A224505 A217286

Adjacent sequences: A197238 A197239 A197240 * A197242 A197243 A197244

Keyword

nonn

Author

R. H. Hardin Oct 12 2011

Status

approved