OFFSET
1,3
COMMENTS
Column 3 of A265863.
EXAMPLE
Some solutions for n=4
..2..3..3....2..2..2....1..0..3....3..0..1....2..1..3....2..0..2....0..1..0
..0..1..2....3..0..0....1..1..2....1..2..0....2..0..1....2..1..0....2..1..1
..0..1..2....3..1..1....3..0..3....3..2..1....3..0..3....3..1..1....3..3..0
..1..3..0....1..0..3....2..0..2....2..3..0....2..0..1....3..3..0....3..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2015
STATUS
approved