OFFSET
1,1
COMMENTS
Row 7 of A216338
EXAMPLE
Some solutions for n=4
..0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x
..x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1
..1..x..2..x....2..x..0..x....1..x..0..x....2..x..0..x....1..x..2..x
..x..3..x..0....x..1..x..3....x..2..x..3....x..1..x..3....x..3..x..1
..4..x..3..x....2..x..4..x....4..x..0..x....4..x..1..x....4..x..5..x
..x..4..x..1....x..0..x..5....x..4..x..5....x..3..x..2....x..3..x..0
..2..x..0..x....3..x..1..x....0..x..4..x....5..x..6..x....6..x..3..x
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 04 2012
STATUS
approved