OFFSET
1,1
COMMENTS
Diagonal of A252254
EXAMPLE
Some solutions for n=4
..2..2..0..2..2..0....3..3..3..3..3..3....3..3..3..3..3..3....3..3..2..3..3..2
..0..3..1..0..3..1....1..0..1..0..1..0....0..1..0..1..0..1....0..0..2..0..0..2
..0..3..1..0..3..1....0..1..0..1..0..1....1..0..1..0..1..0....1..1..0..1..1..0
..2..2..0..2..2..0....1..0..1..0..1..0....0..1..0..1..0..1....3..3..2..3..3..2
..0..3..1..0..3..1....0..1..0..1..0..1....1..0..1..0..1..0....0..0..2..0..0..2
..0..3..1..0..3..1....3..0..1..0..1..0....0..1..0..1..0..3....1..1..0..1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 16 2014
STATUS
approved