OFFSET
1,2
COMMENTS
Column 4 of A264945.
EXAMPLE
Some solutions for n=4
..0..1..2..0....0..1..2..0....0..1..2..0....0..1..0..2....0..1..0..2
..1..2..3..2....1..2..0..3....1..3..0..2....1..2..3..0....1..3..1..0
..0..1..3..2....3..1..2..3....3..1..3..2....1..2..3..0....3..0..2..1
..3..1..3..0....2..0..3..1....1..3..2..0....3..1..3..2....3..2..3..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 29 2015
STATUS
approved