import sys

inputs = sys.stdin.readline

"""再帰関数のときセット
sys.setrecursionlimit(10**7)
import pypyjit
pypyjit.set_param('max_unroll_recursion=-1')
"""


def main():
    def solve():
        N = int(inputs())
        left = N * (N - 1) // 2 + N
        ans = left * 2
        print(ans)

    T = int(inputs())
    for _ in range(T):
        solve()


if __name__ == '__main__':
    main()