OFFSET
1,1
COMMENTS
Diagonal of A223195.
EXAMPLE
Some solutions for n=3
..2..2..2....0..0..0....1..0..1....1..0..0....2..0..2....2..1..1....2..0..2
..1..0..0....1..0..0....1..0..1....1..0..1....2..0..1....2..0..1....1..0..1
..0..0..0....2..0..1....1..0..2....2..2..2....2..2..2....2..0..1....2..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 18 2013
STATUS
approved