OFFSET
1,2
COMMENTS
Superdiagonal 2 of A267278.
EXAMPLE
Some solutions for n=4
..0..0..0..1..1..2....0..2..1..0..3..1....0..0..2..2..3..3....0..3..2..1..3..2
..3..0..1..1..2..2....1..1..3..2..0..3....3..1..1..2..2..3....3..1..0..2..1..3
..3..0..0..2..2..3....0..2..2..3..2..0....0..0..1..1..3..2....1..3..2..0..3..1
..3..3..1..1..3..2....1..1..3..2..0..3....0..0..1..2..1..3....2..1..0..2..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 12 2016
STATUS
approved