OFFSET
1,1
COMMENTS
Column 3 of A187521
EXAMPLE
Some solutions for 4X4
..0..0..1..0....0..1..0..1....2..2..2..3....3..2..3..3....2..2..3..2
..2..2..2..1....0..3..3..2....2..2..1..0....3..2..1..3....2..2..1..2
..2..3..3..3....1..1..1..1....1..2..1..3....1..2..1..1....0..2..1..1
..1..1..0..0....0..3..2..2....0..3..0..0....3..0..1..1....2..3..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 10 2011
STATUS
approved