OFFSET
1,1
COMMENTS
Column 3 of A200165
EXAMPLE
Some solutions for n=5
.-1...-1....2....2....2....1...-3....3....3...-3...-1....3....1...-1...-1....3
..2....1...-2...-1....3....3....2...-2...-2....3...-2...-2...-3...-3....2....1
.-3...-2...-1....2....1....2...-3...-1...-1....1....1....2....1....1...-1....3
..1...-1....1....3...-2...-3...-1....1....1...-3...-2....3...-2...-1...-2...-1
.-2...-2...-2...-1....1....1...-2...-2...-3...-1....3....2...-1....2....3....1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 13 2011
STATUS
approved