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