A197089 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,2,0,1 for x=0,1,2,3,4

1, 161, 7537, 289564, 12635748, 522569033, 21989908007, 923559415946, 38737498552503, 1625808615727565, 68233833241429320, 2863571252883915815, 120178359677506216775, 5043597906899270802555, 211668526758336137032851

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 0's, every 4 is next to 4 1's

Column 7 of A197090

Links

R. H. Hardin, Table of n, a(n) for n = 1..189

Example

Some solutions for n=4
..0..0..0..2..2..0..0....0..0..0..0..0..3..0....0..0..0..0..0..0..0
..0..3..1..2..2..0..0....0..1..0..3..0..0..0....0..3..0..0..0..3..0
..3..0..0..0..1..3..0....0..3..0..1..0..0..3....0..3..0..0..0..1..0
..0..0..3..0..0..0..0....0..0..0..0..0..3..0....0..0..0..0..3..0..0

Crossrefs

Sequence in context: A196640 A232072 A278205 * A278890 A135699 A092312

Adjacent sequences: A197086 A197087 A197088 * A197090 A197091 A197092

Keyword

nonn

Author

R. H. Hardin Oct 10 2011

Status

approved