mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    N = int(input())
    ans = 1
    for i in range(1, 2*N+1):
        if i%2:
            ans = (ans * i)%mod
        else:
            ans = (ans * (i//2))%mod
    print(ans)


if __name__ == '__main__':
    main()