OFFSET
1,1
EXAMPLE
Some solutions for n=4
..0..0..1..2....0..0..1..1....0..0..2..1....0..1..0..1....0..0..0..2
..0..1..2..1....0..1..2..0....0..1..2..1....1..1..1..0....0..0..2..1
..1..2..1..1....2..0..0..2....1..2..0..2....0..0..2..2....2..2..0..0
..2..1..1..2....0..2..1..2....2..1..1..2....1..1..1..2....0..1..2..2
CROSSREFS
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Dec 25 2011
STATUS
approved