OFFSET
1,1
EXAMPLE
Some solutions for n=5
..1....3...-3....3....3....1....3....0....3...-1...-3....2...-2....0...-3...-1
..1....2...-1....2....2....2....0....1...-1...-1...-2....2....3...-3....2...-2
..3...-3....2...-3...-1....3....2....1...-1....2...-3....2...-1....0...-1....3
.-2....2...-3....2....3....2....2...-2...-2...-1....0...-3....3....1....2....0
..3....2...-2...-1...-1....0....1....3....1...-2...-2....1....3....1...-1...-1
..0....2...-3...-1...-1....2....1...-2...-2...-3...-2....2....3....0...-1...-1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 20 2012
STATUS
approved