A197560 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,3,0,2,2 for x=0,1,2,3,4

13, 275, 5280, 139477, 2817383, 64257852, 1435938748, 31372791803, 696517116880, 15437789226545, 341765449897848, 7569824125142348, 167639023580466828, 3712571610572571780, 82219714950533940171, 1820858468171700800429

Offset

1,1

Comments

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

Column 7 of A197561

Links

R. H. Hardin, Table of n, a(n) for n = 1..153

Example

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

Crossrefs

Sequence in context: A196321 A197306 A196973 * A295096 A295550 A320336

Adjacent sequences: A197557 A197558 A197559 * A197561 A197562 A197563

Keyword

nonn

Author

R. H. Hardin Oct 16 2011

Status

approved