OFFSET
1,2
COMMENTS
Column 7 of A221483
EXAMPLE
Some solutions for n=3
..0..2..1..2..0..0..1....0..2..2..1..1..1..0....0..2..2..1..0..3..0
..1..1..2..2..1..2..1....1..1..1..0..3..1..0....1..1..1..0..2..1..1
..0..1..2..0..0..2..0....0..2..0..2..0..2..1....0..2..0..1..2..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 17 2013
STATUS
approved