OFFSET
1,1
COMMENTS
Diagonal of A224281
EXAMPLE
Some solutions for n=3
..2..0..0....0..1..1....0..0..1....0..0..0....0..0..1....2..1..1....0..0..0
..2..2..1....2..2..2....3..2..2....0..1..1....3..3..1....3..2..1....0..0..1
..3..3..3....2..3..0....2..2..2....2..2..1....3..3..2....2..2..3....1..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 02 2013
STATUS
approved