A197306 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,4,0,2,1 for x=0,1,2,3,4

13, 275, 3750, 85087, 1711736, 32070816, 638181656, 12585831905, 246443960437, 4851375382650, 95481614034558, 1877187670574508, 36916252065609179, 726088509349589766, 14280238700708392851, 280852355095712813555

Offset

1,1

Comments

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

Column 7 of A197307

Links

R. H. Hardin, Table of n, a(n) for n = 1..170

Example

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

Crossrefs

Sequence in context: A197455 A196342 A196321 * A196973 A197560 A295096

Adjacent sequences: A197303 A197304 A197305 * A197307 A197308 A197309

Keyword

nonn

Author

R. H. Hardin Oct 13 2011

Status

approved