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