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