1648切蛋糕

 1 #include<iostream>
 2 #include<cstdio>
 3 #include<string>
 4 #include<cstring>
 5 #include<set>
 6 #include<map>
 7 #include<algorithm>
 8 #include<cstdlib>
 9 #include<vector>
10 #include<cmath>
11 #include<sstream>
12 using namespace std;
13 int main()
14 {
15     int T;
16     scanf("%d", &T);
17     while(T--)
18     {
19         int n;
20         scanf("%d", &n);
21         printf("%d\n", (n * n * n + 5 * n) / 6 + 1);
22     }
23     return 0;
24 }