OFFSET
1,1
COMMENTS
Row 3 of A268180.
EXAMPLE
Some solutions for n=3
..0..1..0....0..0..1....0..1..2....0..1..2....0..1..2....0..1..0....0..0..0
..2..0..0....2..2..3....3..2..0....1..1..0....3..2..1....2..0..0....1..1..2
..0..1..3....2..2..2....1..0..1....2..2..2....3..3..0....2..2..2....2..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 28 2016
STATUS
approved