using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;
 
class Program
{
    public void Proc()
    {
        Reader.IsDebug = false;
        int itemCount = int.Parse(Reader.ReadLine());
        
        int[] inpt = Reader.GetInt();
        List<int> switchList = new List<int>(inpt);
        switchList.Sort();
        HashSet<int> tmp = this.GetAnsList(0, switchList);
        Console.WriteLine(tmp.Count);
        

    }
    
    private Dictionary<int, Dictionary<string, HashSet<int>>> dic = new Dictionary<int, Dictionary<string, HashSet<int>>>();
    
    private HashSet<int> GetAnsList(int srcNum, List<int> switchList) {
        string key = string.Join("#", switchList);
        if(!dic.ContainsKey(srcNum)) {
            dic.Add(srcNum, new Dictionary<string, HashSet<int>>());
        }
        if(dic[srcNum].ContainsKey(key)) {
            return dic[srcNum][key];
        }
        HashSet<int> ans = new HashSet<int>();
        ans.Add(srcNum);
        if(switchList.Count == 1) {
            int val = srcNum ^ switchList[0];
            ans.Add(val);
        } else
        {
            for(int i=0; i<switchList.Count; i++) {
                List<int> subList = new List<int>(switchList);
                subList.RemoveAt(i);
                int val = srcNum ^ switchList[i];
                HashSet<int> ret = this.GetAnsList(val, subList);
                ret.ToList().ForEach(a=>ans.Add(a));
            }
        }
        dic[srcNum].Add(key, ans);
        return ans;
    }


    public class Reader
    {
        public static bool IsDebug = true;
        private static String PlainInput = @"


6
1 1 4 5 1 4



 
";
        private static System.IO.StringReader Sr = null;
        public static string ReadLine()
        {
            if (IsDebug)
            {
                if (Sr == null)
                {
                    Sr = new System.IO.StringReader(PlainInput.Trim());
                }
                return Sr.ReadLine();
            }
            else
            {
                return Console.ReadLine();
            }
        }
        public static int[] GetInt(char delimiter = ' ', bool trim = false)
        {
            string inptStr = ReadLine();
            if (trim)
            {
                inptStr = inptStr.Trim();
            }
            string[] inpt = inptStr.Split(delimiter);
            int[] ret = new int[inpt.Length];
            for (int i = 0; i < inpt.Length; i++)
            {
                ret[i] = int.Parse(inpt[i]);
            }
            return ret;
        }
    }
    static void Main()
    {
        Program prg = new Program();
        prg.Proc();
    }
}