OFFSET
1,2
COMMENTS
Diagonal of A210320
EXAMPLE
Some solutions for n=4
..0..0..0..0..0....0..0..1..2..0....0..0..0..0..1....0..0..0..1..1
..1..1..1..0..1....2..2..1..2..0....0..1..2..2..0....1..1..2..2..3
..0..2..0..0..2....0..1..0..2..2....2..0..0..0..1....0..3..3..0..0
..1..1..0..1..0....0..1..3..2..0....2..3..2..3..1....3..3..0..2..1
..0..1..0..3..3....0..0..0..2..0....1..1..3..3..3....0..1..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 20 2012
STATUS
approved