OFFSET
1,2
COMMENTS
Column 4 of A267901.
EXAMPLE
Some solutions for n=4
..0..0..1..3....0..3..2..2....0..0..1..1....0..2..2..1....0..0..1..1
..2..2..1..3....0..3..0..0....2..2..3..0....0..1..1..1....0..0..3..3
..1..0..2..2....2..1..1..3....1..2..3..0....3..2..3..3....2..3..2..2
..1..0..3..3....2..1..1..3....1..2..3..3....3..2..0..0....2..3..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 22 2016
STATUS
approved