OFFSET
1,1
COMMENTS
Row 5 of A267425.
EXAMPLE
Some solutions for n=11
..0..0..0..0..1..1..2..2..3..3..4....0..1..1..1..2..2..3..3..4..4..0
..0..0..1..1..1..2..2..3..3..4..4....1..1..2..2..2..3..3..4..4..0..0
..1..1..1..2..2..2..3..3..4..4..4....2..2..2..3..3..3..4..4..0..0..1
..1..1..2..2..3..3..3..4..4..0..0....2..2..3..3..4..4..4..0..0..1..1
..1..2..2..3..3..4..4..4..0..0..0....2..3..3..4..4..0..0..0..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 14 2016
STATUS
approved