OFFSET
1,2
COMMENTS
Every 0 is next to 0 1's, every 1 is next to 1 3'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 A196922
EXAMPLE
Some solutions for n=4
..2..2..2..0....0..0..0..0....0..2..2..2....2..2..2..2....0..0..0..0
..2..0..2..0....2..2..2..2....0..2..0..2....2..0..0..2....0..0..0..0
..2..0..2..0....2..0..0..2....0..2..0..2....2..2..2..2....2..2..0..0
..2..2..2..0....2..2..2..2....0..2..2..2....0..0..0..0....2..2..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 07 2011
STATUS
approved