OFFSET
1,2
COMMENTS
Column 4 of A265870.
EXAMPLE
Some solutions for n=3
..1..2..0..0....0..2..2..0....1..1..0..1....1..2..0..1....1..1..2..0
..1..1..0..2....1..1..0..2....0..0..2..2....2..1..0..0....2..2..0..0
..0..1..2..2....2..1..1..0....1..2..2..0....2..0..1..2....2..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 17 2015
STATUS
approved