OFFSET
1,1
COMMENTS
Diagonal of A223725
EXAMPLE
Some solutions for n=3
..2..1..1....2..2..0....2..2..2....1..1..2....2..0..0....2..1..1....1..2..1
..0..0..1....2..1..1....2..2..0....2..1..1....0..1..0....1..2..2....1..2..1
..0..0..0....1..1..1....2..2..0....0..0..1....0..2..0....0..1..0....0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 26 2013
STATUS
approved