杭电ACM1249——三角形

#include <iostream>
using namespace std;

int a[10005];

int main()
{
a[0] = 0; a[1] = 2; a[2] = 8;
for(int i = 3; i < 10002; i++)
a[i] = a[i - 1] + 3 * (i - 1) * 2;
int n, t;
cin >> t;
while(t--)
{
cin >> n;
cout << a
<< endl;
}
return 0;
}