OFFSET
1,2
COMMENTS
Column 2 of A264954.
EXAMPLE
Some solutions for n=4
..1..2....2..0....2..3....2..1....3..1....0..3....1..2....3..2....0..1....3..1
..0..3....3..1....0..1....0..2....0..3....2..1....2..0....0..1....2..3....1..3
..3..1....0..2....1..3....3..0....2..0....1..3....0..3....2..3....1..0....2..0
..0..2....3..1....2..0....1..3....1..2....0..2....3..1....0..1....3..2....0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 29 2015
STATUS
approved