OFFSET
1,2
EXAMPLE
Some solutions with all values 0 to 4 for n=4:
..0..0..1..2....0..1..2..2....0..1..2..2....0..1..2..1....0..0..0..1
..3..3..1..2....0..1..1..3....0..1..3..3....0..1..2..1....2..0..1..1
..3..0..4..4....0..4..4..3....2..2..2..4....1..3..4..4....2..3..3..1
..0..0..0..4....2..2..1..1....1..1..2..4....1..3..3..3....4..4..1..1
CROSSREFS
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Oct 29 2011
STATUS
approved