OFFSET
1,1
COMMENTS
Column 4 of A221551
EXAMPLE
Some solutions for n=3
..1..0..2..2....0..2..0..2....1..2..0..0....2..2..1..0....2..2..0..1
..2..1..2..0....1..2..2..2....1..3..0..1....1..0..1..0....0..0..1..1
..0..0..1..1....0..0..1..0....1..1..2..0....1..2..1..1....1..3..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 19 2013
STATUS
approved