OFFSET
1,1
COMMENTS
Diagonal of A209019
EXAMPLE
Some solutions for n=4
..2..3..1..0....1..2..1..3....2..3..1..3....1..3..2..1....0..1..2..3
..3..2..3..0....3..3..3..0....3..2..1..1....2..1..0..3....1..3..3..0
..2..3..3..0....0..3..1..1....0..2..0..1....3..3..3..0....2..0..1..2
..1..3..0..2....3..1..0..0....1..3..3..1....0..3..1..3....1..2..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 04 2012
STATUS
approved