OFFSET
1,1
COMMENTS
Column 7 of A221609
EXAMPLE
Some solutions for n=3
..0..2..2..2..0..2..1....0..2..3..2..0..0..1....0..2..2..2..1..0..0
..0..0..1..0..1..1..1....0..0..0..1..3..2..0....0..0..1..3..2..2..0
..0..1..1..1..2..3..0....1..2..0..2..1..1..0....1..1..1..1..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 20 2013
STATUS
approved