A197778 Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,2,1,1,1 for x=0,1,2,3,4

3, 43, 338, 3021, 25962, 221082, 1924263, 16672219, 144064579, 1245052112, 10769305267, 93170128818, 805820664778, 6968541278217, 60268080303023, 521264825241735, 4508358297890862, 38991305275498893, 337224718195909596

Offset

1,1

Comments

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

Column 4 of A197782

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions containing all values 0 to 4 for n=5
..1..3..1..2....1..3..1..2....0..1..0..0....0..1..2..0....2..1..0..0
..2..1..4..1....2..1..4..1....0..2..2..1....2..1..1..0....1..4..1..2
..0..0..1..3....0..1..1..0....0..1..1..3....1..4..1..2....3..1..1..1
..1..2..2..1....1..2..2..1....2..1..4..1....3..1..1..1....1..2..2..1
..0..1..0..0....0..0..0..0....1..0..1..2....1..2..2..1....0..0..0..0

Crossrefs

Sequence in context: A054698 A229695 A060559 * A321970 A199349 A197609

Adjacent sequences: A197775 A197776 A197777 * A197779 A197780 A197781

Keyword

nonn

Author

R. H. Hardin Oct 18 2011

Status

approved