OFFSET
1,1
COMMENTS
Diagonal of A219816
EXAMPLE
Some solutions for n=3
..1..0..0....1..0..0....0..0..0....0..0..0....1..0..0....2..1..1....0..0..0
..1..0..0....1..0..0....2..0..0....1..0..0....2..1..0....2..1..1....0..0..0
..2..1..0....2..2..0....2..2..1....2..2..0....2..1..1....2..1..1....0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 28 2012
STATUS
approved