题解 | #等差数列#
等差数列
https://www.nowcoder.com/practice/f792cb014ed0474fb8f53389e7d9c07f
n = int(input()) l1 = [] num = 2 for i in range(1, n+1): l1.append(num) num += 3 print(sum(l1))
等差数列
https://www.nowcoder.com/practice/f792cb014ed0474fb8f53389e7d9c07f
n = int(input()) l1 = [] num = 2 for i in range(1, n+1): l1.append(num) num += 3 print(sum(l1))
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