OFFSET
1,3
COMMENTS
Column 3 of A267072.
EXAMPLE
Some solutions for n=4
..0..0..2....0..2..2....0..2..0....0..2..1....0..0..3....0..3..3....0..0..2
..0..3..1....2..0..3....3..2..2....2..2..1....2..0..2....1..1..3....1..3..1
..3..1..1....0..3..1....0..3..1....0..3..3....1..3..2....2..0..2....3..2..1
..3..2..2....1..1..3....1..1..3....1..0..3....1..3..1....1..0..2....3..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 10 2016
STATUS
approved