OFFSET
1,2
COMMENTS
Column 4 of A265089.
EXAMPLE
Some solutions for n=4
..3..2..0..1....2..2..0..2....3..3..0..0....3..1..1..1....0..1..3..2
..0..1..2..3....3..0..2..1....1..1..3..1....1..2..0..3....3..2..0..1
..3..2..1..0....1..1..1..3....2..0..2..2....2..0..2..2....3..1..2..0
..0..1..3..2....0..3..3..0....0..2..1..3....0..3..3..0....0..2..1..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 01 2015
STATUS
approved