OFFSET
1,3
COMMENTS
Column 3 of A199588
EXAMPLE
Some solutions for n=4
..0..0..0....0..0..1....0..0..1....0..0..0....0..1..1....0..1..1....0..0..1
..1..2..2....0..2..1....0..1..1....1..1..1....0..1..2....0..2..1....2..0..1
..1..1..2....2..2..1....2..2..2....2..2..2....0..2..2....0..2..2....2..2..1
..3..3..3....3..3..3....3..3..3....3..3..3....3..3..3....3..3..3....3..3..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 08 2011
STATUS
approved