OFFSET
1,2
COMMENTS
Column 5 of A202168
EXAMPLE
Some solutions for n=3
..0..2..1..1..1....0..0..2..1..1....0..0..2..1..1....0..0..1..2..1
..0..2..1..1..2....0..0..3..1..1....0..2..2..3..3....0..0..2..2..1
..1..2..3..2..3....0..3..3..2..2....0..1..3..3..2....2..2..3..3..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 13 2011
STATUS
approved