OFFSET
1,2
COMMENTS
Row 5 of A268115.
EXAMPLE
Some solutions for n=6
..0..1..1..2..3..3....0..1..1..2..3..4....0..1..2..2..3..4....0..1..1..2..3..4
..0..1..2..2..3..4....0..1..2..3..4..0....1..1..2..3..4..0....0..1..2..2..3..4
..0..1..2..3..4..0....1..1..2..3..4..0....1..2..3..4..4..0....0..1..2..3..3..4
..1..2..3..4..4..0....1..2..3..3..4..0....2..3..4..0..0..1....0..1..2..3..4..0
..1..2..3..4..4..0....2..2..3..4..4..0....3..3..4..0..1..2....1..2..3..4..4..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 26 2016
STATUS
approved