OFFSET
1,2
COMMENTS
Row 4 of A221817
EXAMPLE
Some solutions for n=3
..1..2..1....1..1..0....1..2..0....0..2..0....1..3..1....1..0..0....0..2..1
..0..2..0....0..2..1....0..2..1....1..2..1....0..1..0....0..3..1....0..3..0
..0..1..0....1..3..0....1..1..1....0..1..1....1..2..0....1..3..0....2..3..1
..1..3..1....1..2..0....0..3..0....1..3..0....1..2..0....1..2..0....0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 26 2013
STATUS
approved