OFFSET
1,2
COMMENTS
Column 4 of A199201
EXAMPLE
Some solutions for n=5
..0..1..0..1....0..1..0..1....0..1..0..2....0..1..0..2....0..1..0..2
..2..3..1..2....1..2..3..0....2..3..2..1....3..2..1..3....2..3..2..3
..3..2..0..3....0..3..2..2....0..1..3..0....2..0..2..1....0..1..1..0
..0..3..1..2....3..1..2..2....2..3..1..2....3..2..1..3....3..1..1..2
..3..1..2..0....1..3..0..3....3..0..3..1....0..3..0..1....2..3..0..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 03 2011
STATUS
approved