OFFSET
1,3
COMMENTS
Column 4 of A180843
EXAMPLE
Some solutions for 3X4
..2..1..1..1....2..1..1..1....2..1..1..1....2..1..1..1....2..1..1..1
..2..3..2..1....2..3..2..1....2..3..2..1....2..3..2..1....2..3..3..1
..2..3..3..3....3..2..3..3....3..3..3..2....3..3..2..3....3..3..2..2
...
..2..1..1..1....2..1..1..1....2..1..1..1....2..1..1..1....2..2..1..1
..2..3..2..2....2..3..3..2....2..3..3..2....2..3..3..2....2..2..3..1
..3..3..3..1....3..2..1..3....3..3..1..2....3..3..2..1....3..1..3..3
...
..2..2..1..1....2..1..1..1....2..1..1..1....2..2..1..1....2..2..1..1
..2..2..3..3....3..2..2..1....3..3..2..1....3..1..2..1....3..1..2..1
..3..1..3..1....3..3..2..3....3..3..2..2....3..2..3..3....3..3..3..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 20 2010
STATUS
approved