OFFSET
1,1
COMMENTS
Column 6 of A187140
EXAMPLE
Some solutions for 4X7
..1..0..1..2..2..2..0....1..1..2..0..2..2..2....1..0..0..0..1..1..0
..0..0..1..2..1..1..1....0..0..0..0..2..2..1....0..0..1..0..0..2..2
..0..0..0..0..0..1..0....0..0..0..1..1..2..1....0..0..0..0..1..1..1
..0..0..0..1..1..2..0....0..0..0..1..1..1..0....0..0..0..1..2..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 05 2011
STATUS
approved