OFFSET
1,1
EXAMPLE
Some solutions for n=5
..0..0..1..2..3..3..2....0..1..1..0..0..2..3....0..0..1..1..0..1..2
..3..0..0..1..2..3..2....3..0..0..2..1..3..2....1..1..0..0..1..0..3
..2..1..2..1..0..1..0....0..1..1..2..0..1..2....2..1..1..2..0..3..1
..1..3..2..2..3..0..3....1..3..0..0..1..3..3....3..0..2..0..1..3..2
..1..0..3..1..0..3..3....2..0..2..2..1..1..0....3..1..3..2..2..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 22 2012
STATUS
approved