OFFSET
1,1
COMMENTS
Diagonal of A252148
EXAMPLE
Some solutions for n=4
..3..0..0..3..2..0....2..0..3..0..3..3....1..2..3..1..2..0....3..0..3..0..2..3
..2..1..3..2..1..3....1..3..1..3..1..3....3..3..0..0..0..0....1..3..1..3..1..3
..1..2..0..1..2..0....3..0..3..0..3..0....2..1..0..2..1..0....3..0..3..0..3..0
..3..0..0..3..0..0....1..3..1..3..1..3....1..2..0..1..2..3....1..3..1..3..1..2
..2..1..3..2..1..3....2..0..3..0..3..0....0..0..0..0..3..0....2..0..3..0..3..3
..1..2..0..1..2..0....0..2..3..2..1..2....2..3..0..2..1..0....3..3..1..3..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 14 2014
STATUS
approved