OFFSET
1,2
COMMENTS
Row 5 of A267553.
EXAMPLE
Some solutions for n=4
..0..0..1..1....0..0..1..2....0..1..1..2....0..1..1..2....0..4..0..1
..1..1..2..2....1..1..2..3....1..1..2..3....1..2..2..3....0..0..1..2
..2..2..3..3....1..2..3..4....2..2..3..4....2..3..3..4....1..1..2..3
..3..3..4..4....2..3..4..4....3..3..4..0....3..4..4..0....2..2..3..4
..4..4..0..0....3..4..0..0....4..4..0..0....4..0..0..1....3..3..4..4
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 17 2016
STATUS
approved