OFFSET
1,1
COMMENTS
Diagonal of A252352
EXAMPLE
Some solutions for n=4
..3..1..3..0..1..0....2..3..2..2..3..2....3..1..3..0..1..3....0..3..1..3..0..1
..2..0..2..2..3..2....3..1..0..3..1..0....2..0..2..2..3..2....2..2..3..2..2..0
..2..3..2..2..3..2....2..3..2..2..3..2....2..3..2..2..0..2....2..2..3..2..2..0
..0..1..3..3..1..3....2..0..2..2..3..2....3..1..3..3..1..3....3..3..1..3..3..1
..2..3..2..2..3..2....3..1..3..3..1..0....2..3..2..2..0..2....2..2..0..2..2..0
..2..3..2..2..0..2....2..0..2..2..0..0....2..0..2..2..0..2....2..2..0..2..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 16 2014
STATUS
approved