OFFSET
1,2
COMMENTS
Row 5 of A267655.
EXAMPLE
Some solutions for n=7
..0..1..2..3..4..1..2....0..0..2..3..3..4..1....0..0..2..3..4..0..1
..1..2..3..4..0..1..3....0..1..3..3..4..0..1....0..1..3..4..0..1..1
..1..3..4..0..1..2..4....0..2..3..4..4..1..2....1..2..3..4..0..1..2
..2..3..0..0..2..3..4....1..2..3..4..0..1..3....2..3..4..4..0..2..2
..3..4..0..1..2..4..0....2..2..4..0..1..2..4....3..3..4..4..1..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 19 2016
STATUS
approved