4. (6 points) In the dot array shown in the figure, there are 3 dots in figure (1), 7 dots in figure (2), 13 dots in figure (3), and 21 dots in figure (4). Following this pattern, there are $\qquad$ dots in figure (10).
【Answer】Solution: According to the pattern we derived, we can get:
In figure (10), there are $3+$ $(4+6+8+10+12+14+16+18+20)=3+(4+20) \times 9 \div 2=111$;

Therefore, the answer is: 111.