OFFSET
1,1
EXAMPLE
Some solutions for n=3
..0..1..1..1....0..1..0..1....0..1..1..0....0..1..1..1....0..1..2..1
..1..1..1..1....1..0..1..1....1..0..1..0....1..0..1..1....1..1..1..2
..1..1..1..1....0..1..1..1....1..1..0..1....1..1..1..2....2..1..2..2
..1..1..1..2....1..1..1..0....0..0..1..1....1..1..2..1....1..2..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 27 2012
STATUS
approved