n=4的一些解
.-6...-2...-2...-1....5....2....6...-1...-1...-2...-6....4....2...-6....6...-4
..6...-1...-2....2...-1....3....3...-2...-6...-4...-3...-3....6....3....3...-2
..3...-2....5....2....2....1....3...-6...-6....4....6...-6....4....6....3...-4
.-2...-1....3...-6...-1...-3...-1....3....3....4....5....4...-5...-1...-6....4
.-3....1...-1...-2...-3....6...-6....1...-3...-1...-3....2....2...-3....1....5
.-6...-5....6....1...-2....2....5....1....5....4....5....5...-3...-1...-3...-4