OFFSET
1,1
COMMENTS
Column 4 of A221886
EXAMPLE
Some solutions for n=3
..0..2..0..1....0..2..0..2....0..0..1..1....0..2..0..2....0..3..0..2
..1..2..2..1....0..0..1..3....1..3..0..1....0..0..0..2....1..0..1..1
..0..0..2..1....3..0..1..0....1..0..2..2....1..3..1..1....0..1..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 30 2013
STATUS
approved