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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 05 2011
STATUS
approved