A197358 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,3,1,1,1 for x=0,1,2,3,4

1, 1, 33, 803, 79051, 24799027, 22225081365, 66858428077735

Offset

1,3

Comments

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

Diagonal of A197364

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A100788 A051565 A014931 * A299074 A101632 A159675

Adjacent sequences: A197355 A197356 A197357 * A197359 A197360 A197361

Keyword

nonn

Author

R. H. Hardin Oct 14 2011

Status

approved