OFFSET
1,1
EXAMPLE
Some solutions for n=5
..0..0..1..0..0..1..1....0..1..2..2..1..0..0....0..1..1..0..0..2..3
..2..1..0..1..3..1..3....3..0..0..1..1..2..3....3..0..0..2..1..3..2
..3..1..1..3..0..2..0....3..3..2..0..0..2..1....0..1..0..2..0..1..2
..0..2..0..0..1..1..3....1..3..1..0..0..1..0....1..3..1..0..1..3..3
..3..0..3..1..1..3..2....2..0..2..1..1..0..3....2..0..2..2..1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 25 2012
STATUS
approved