------
## 最终结论
```python
def find_lucas(n):
    if n == 0:
        return 2
    elif n == 1:
        return 1
    else:
        return find_lucas(n - 1) + find_lucas(n - 2)

assert find_lucas(9) == 76
assert find_lucas(4) == 7
assert find_lucas(3) == 4
```