OFFSET
1,2
COMMENTS
Superdiagonal 1 of A267019.
EXAMPLE
Some solutions for n=4
..0..1..3..1..0....0..1..3..1..3....0..2..1..3..0....0..2..0..2..0
..2..0..2..0..2....2..0..1..3..1....3..1..3..1..3....2..0..3..1..2
..1..3..1..3..1....0..2..0..2..3....2..3..2..0..1....1..3..1..3..1
..3..2..3..2..0....2..1..2..0..3....0..2..0..2..1....3..2..0..1..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 09 2016
STATUS
approved