OFFSET
1,2
COMMENTS
Superdiagonal 2 of A267197.
EXAMPLE
Some solutions for n=4
..0..1..2..3..3..0....0..1..2..2..3..0....0..1..1..2..3..0....0..1..1..2..3..3
..1..1..2..3..0..0....1..1..2..3..3..0....0..1..2..2..3..0....0..1..1..2..3..3
..1..2..2..3..0..1....1..1..2..3..3..0....1..1..2..3..3..0....0..1..2..2..3..0
..2..2..3..3..0..1....1..2..2..3..0..0....1..2..2..3..3..0....0..1..2..2..3..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 11 2016
STATUS
approved