OFFSET
1,1
EXAMPLE
Some solutions for n=3
..0..0..2..0....0..2..3..1....2..0..3..3....0..0..2..2....2..0..0..2
..0..2..0..3....2..2..2..3....0..2..2..3....0..1..2..3....0..0..3..0
..2..0..3..1....3..2..1..1....3..2..3..3....2..2..1..3....0..3..1..3
..0..3..1..0....1..3..1..2....3..3..3..0....2..3..3..3....2..0..3..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 31 2012
STATUS
approved