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