#include <iostream>
#include <cstdio>
#include <cmath>
#include <vector>
#include <map>
#include <set>
#include <string>
#include <cstring>
#include <algorithm>
#include <iomanip>
#include <queue>
#include <cstdlib>
#include <ctime>
#include <cassert>
#include <stack>
#include <bitset>
#include <sstream>
#include <fstream>

typedef unsigned long long ull;
#define mp make_pair
#define pb push_back

const long double eps = 1e-9;
const double pi = acos(-1.0);
const long long inf = 1e18;

using namespace std;

// *************************************************


int readInt(int l, int r, string name){
    int x;
    if(scanf("%d", &x) != 1){
        fprintf(stderr, "Expected int %s in range [%d, %d], but haven't found!", name.c_str(), l, r);
        throw;
    }
    if(!(l <= x && x <= r)){
        fprintf(stderr, "Expected int %s in range [%d, %d], but found %d!", name.c_str(), l, r, x);
        throw;
    }
    return x;
}

// *************************************************

int n;

long long fun( int n )
{
    return 1ll * n * ( n + 1 ) / 2;
}

void solve()
{
    n = readInt( 1, 100000, "N" );
    cout << fun( n + 1 ) << "\n"; 
}

int main (int argc, const char * argv[])
{
    time_t start = clock();
    int t = readInt( 1, 100000, "T" );
    for ( int i = 0; i < t; i++ ) solve();
    cerr << fixed << setprecision( 6 ) << "Time: " << 1.0 * ( clock() - start ) / CLOCKS_PER_SEC << "\n";
    return 0;
}