OFFSET
1,2
COMMENTS
Row 4 of A267724.
EXAMPLE
Some solutions for n=4
..0..0..0..0....0..0..3..3....0..0..1..1....0..0..2..2....0..0..2..2
..2..2..3..3....1..1..3..3....0..0..3..3....1..1..3..3....3..3..3..3
..2..2..1..1....2..2..0..0....2..2..3..3....0..0..3..3....2..2..0..0
..1..1..3..3....1..1..2..2....2..2..1..1....1..1..2..2....1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 20 2016
STATUS
approved