OFFSET
1,1
COMMENTS
Column 5 of A221609
EXAMPLE
Some solutions for n=3
..0..2..1..3..1....0..2..1..0..2....0..2..2..2..0....1..1..1..1..0
..1..1..0..0..2....1..2..1..3..0....1..0..0..2..1....0..2..2..3..0
..0..1..1..2..0....0..1..1..1..0....1..1..0..2..1....1..0..1..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 20 2013
STATUS
approved