A197670 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,1,0,1 for x=0,1,2,3,4

16, 642, 14503, 403960, 11277331, 311676959, 8613257822, 239118653300, 6630227642552, 183756345226485, 5094599088185193, 141246701196281961, 3915786139554013344, 108558677747367102730, 3009656266880644396542

Offset

1,1

Comments

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

Column 6 of A197672

Links

R. H. Hardin, Table of n, a(n) for n = 1..133

Example

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

Crossrefs

Sequence in context: A091496 A139166 A128048 * A162546 A328274 A249950

Adjacent sequences: A197667 A197668 A197669 * A197671 A197672 A197673

Keyword

nonn

Author

R. H. Hardin Oct 17 2011

Status

approved