OFFSET
1,2
COMMENTS
Row 4 of A221400.
EXAMPLE
Some solutions for n=3
..0..2..0....0..2..0....0..2..0....0..2..0....0..2..0....0..2..0....1..2..1
..2..2..1....2..2..0....2..2..0....1..2..2....1..2..0....0..2..2....1..2..0
..0..2..0....0..2..2....1..2..0....0..2..0....1..2..1....0..2..2....0..2..0
..0..2..1....0..2..0....0..2..1....1..2..0....1..2..0....0..2..0....0..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 15 2013
STATUS
approved