OFFSET
1,1
COMMENTS
Diagonal of A219373
EXAMPLE
Some solutions for n=3
..1..1..0....2..2..2....2..2..3....0..0..0....0..0..0....2..0..2....1..1..0
..1..0..0....2..2..3....2..0..3....0..0..2....0..0..0....0..0..0....1..0..0
..3..2..0....2..3..3....0..0..0....3..3..3....1..3..0....1..0..0....3..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 19 2012
STATUS
approved