OFFSET
1,1
COMMENTS
Diagonal of A209897
EXAMPLE
Some solutions for n=4
..0..0..1..1..1....0..0..1..1..1....0..0..0..1..1....0..1..0..2..1
..1..0..1..2..2....2..0..0..0..0....2..0..1..0..1....0..1..0..2..1
..0..1..1..2..1....2..0..1..1..1....2..0..1..0..0....0..0..0..2..2
..1..0..1..2..1....2..0..0..0..1....2..0..1..0..1....0..1..0..2..0
..1..1..1..1..1....2..2..0..1..0....2..0..0..0..1....0..1..0..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 14 2012
STATUS
approved