OFFSET
1,3
COMMENTS
Column 3 of A199363.
EXAMPLE
Some solutions for n=4
..0..0..1....0..0..1....0..0..0....0..0..0....0..0..0....0..1..1....0..0..0
..0..1..1....2..0..1....1..2..2....1..2..2....1..1..1....0..0..1....1..2..2
..2..2..2....2..3..1....1..3..2....1..2..3....2..2..3....2..2..3....1..1..2
..3..3..3....2..3..3....1..3..3....1..3..3....2..3..3....2..3..3....3..3..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 05 2011
STATUS
approved