OFFSET
1,1
COMMENTS
Column 2 of A187633
EXAMPLE
Some solutions for 4X4
..2..0..0..2....2..1..2..0....1..1..1..0....1..2..2..1....0..1..2..1
..1..1..1..0....2..0..0..1....2..0..0..2....2..2..2..2....2..0..0..1
..2..2..2..0....1..0..0..1....2..0..0..1....2..2..2..2....1..0..0..1
..1..0..0..1....2..2..2..2....1..1..2..0....1..2..2..1....1..2..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 12 2011
STATUS
approved