A196699 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,1,0,4,2 for x=0,1,2,3,4

1, 11, 207, 16676, 4114365, 3444722540, 9630587515529, 90075372757265811

Offset

1,2

Comments

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

Diagonal of A196707

Links

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

Example

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

Crossrefs

Sequence in context: A371387 A196849 A373348 * A374095 A131216 A034909

Adjacent sequences: A196696 A196697 A196698 * A196700 A196701 A196702

Keyword

nonn

Author

R. H. Hardin Oct 05 2011

Status

approved