using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var dp = new long[1000001];
        for (var i = 3L; i < dp.Length; ++i) dp[i] = dp[i - 1] + (i - 2) * (i - 1) * 2;
        var t = NN;
        var ans = new long[t];
        for (var u = 0; u < t; ++u)
        {
            ans[u] = dp[NN];
        }
        WriteLine(string.Join("\n", ans));
    }
}