------
## 最终结论
```python
def smartNumber(n):
    smart_numbers = []
    num = 30
    while len(smart_numbers) < n:
        if num % 2 == 0 and num % 3 == 0 and num % 5 == 0:
            smart_numbers.append(num)
        num += 1
    return smart_numbers[-1]

assert smartNumber(1) == 30
assert smartNumber(50) == 273
assert smartNumber(1000) == 2664
```