#include <bits/stdc++.h>
using namespace std;

int main() {
    int t;
    cin >> t;
    vector<long long> out(1000001);
    out[3] = 4;
    for(int i=4;i<1000001;i++) {
        long long p = (long long)(i - 1) * (i - 2);
        // q = (1 + 2 + 3 + ... + i - 2) * 2
        long long q = (long long)(i - 1) * (i - 2);
        out[i] = out[i-1] + p + q;
    }

    for(int i=0;i<t;i++) {
        int n;
        cin >> n;
        cout << out[n] << endl;
    }

    return 0;
}