OFFSET
1,1
COMMENTS
Diagonal of A251905
EXAMPLE
Some solutions for n=4
..3..2..3..1..3..2....1..1..0..0..3..3....0..2..1..3..3..1....2..3..1..2..0..1
..3..0..3..0..3..0....0..3..3..1..2..0....3..3..0..0..1..2....2..0..0..3..3..1
..1..0..2..0..1..0....1..2..0..0..3..3....0..2..1..3..3..0....3..3..2..1..0..0
..2..3..1..3..2..3....0..3..3..1..2..0....3..3..0..0..2..1....2..0..0..3..3..1
..0..3..0..3..0..3....1..1..0..0..3..3....0..1..2..3..3..0....2..3..1..2..0..0
..0..2..0..1..1..1....0..3..3..1..2..0....3..3..0..0..1..2....2..0..0..3..3..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 10 2014
STATUS
approved