OFFSET
1,1
COMMENTS
Column 4 of A221229
EXAMPLE
Some solutions for n=3
..1..1..0..0....2..0..1..2....2..0..0..0....1..0..1..1....1..1..1..2
..2..0..2..1....0..2..0..0....2..1..1..1....2..0..2..0....0..2..0..0
..2..2..1..0....2..1..2..0....2..1..0..2....0..2..2..1....1..0..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 05 2013
STATUS
approved