<image> As shown in the figure, on the number line, the initial position of point A represents the number 1. Now point A moves as follows: the first time, point A moves 3 units to the left to point \( A_{1} \); the second time, from point \( A_{1} \), it moves 6 units to the right to point \( A_{2} \); the third time, from point \( A_{2} \), it moves 9 units to the left to point \( A_{3} \); … and continues moving in this pattern. The number represented by point \( A_{4} \) is ____. If the distance between point \( A_{n} \) and the origin is no less than 20, then the minimum value of \( n \) is ____.