OFFSET
1,1
COMMENTS
Column 2 of A187670
EXAMPLE
Some solutions for 4X4
..1..0..1..2....2..0..2..1....1..1..2..0....2..2..2..2....1..0..1..0
..2..2..0..2....2..1..0..2....1..2..1..2....2..1..0..2....1..2..0..1
..1..0..1..2....2..0..1..1....2..1..2..1....2..0..1..2....1..0..2..1
..0..2..0..2....1..2..0..2....0..2..1..1....1..2..2..2....0..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 12 2011
STATUS
approved