OFFSET
1,2
COMMENTS
Diagonal of A183492
EXAMPLE
Some solutions for 3X3
..2..3..0....0..0..0....0..0..0....0..3..3....2..2..0....0..3..3....3..3..0
..2..3..0....2..1..2....3..2..2....0..2..2....1..1..0....0..0..0....0..0..0
..0..0..0....2..1..2....3..2..2....0..1..1....2..2..0....1..1..0....2..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 05 2011
STATUS
approved