[anuwta]

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

class anuwta {
    public static void main(String[] args) throws IOException {
        BufferedReader b = new BufferedReader(new InputStreamReader(System.in));
        int t = Integer.parseInt(b.readLine());
        while (t-- > 0) {
            int n = Integer.parseInt(b.readLine());
            long result = calcDistanceYouWalked(n);
            System.out.println(result);
        }
    }

    private static long calcDistanceYouWalked(int n) {
        // TODO Auto-generated method stub
        return (n + 1) * (n + 2) / 2 - 1;
    }
}