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 2's, every 3 is next to 3 4's, every 4 is next to 4 0's
Diagonal of A197079
EXAMPLE
Some solutions for n=4
..1..0..2..2....1..1..0..0....0..0..0..0....1..1..0..0....1..0..0..0
..1..0..2..2....2..2..1..1....1..2..2..1....0..0..0..0....1..0..0..1
..0..1..0..1....2..2..0..0....1..2..2..1....0..0..4..0....0..2..2..1
..0..1..0..1....1..1..0..0....0..1..1..0....0..0..0..0....0..2..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 09 2011
STATUS
approved