题解 | 等差数列
等差数列
https://www.nowcoder.com/practice/f792cb014ed0474fb8f53389e7d9c07f
while True: try: n = int(input()) m = 0 for i in range(n): m += 2 + 3*i print(m) except: break
等差数列
https://www.nowcoder.com/practice/f792cb014ed0474fb8f53389e7d9c07f
while True: try: n = int(input()) m = 0 for i in range(n): m += 2 + 3*i print(m) except: break
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