using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static long NN => long.Parse(ReadLine());
    static double[] NList => ReadLine().Split().Select(double.Parse).ToArray();
    static double[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        if (n % 2 == 1)
        {
            WriteLine(0);
            return;
        }
        n /= 2;
        var mod = 998_244_353;
        var c = new long[n];
        var t = new long[n];
        c[0] = 1;
        for (var i = 0; i < n; ++i)
        {
            for (var j = 0; j < i; ++j)
            {
                var k = i - j - 1;
                t[i] = (t[i] + c[j] * t[k] + c[k] * t[j]) % mod;
                c[i] = (c[i] + c[j] * c[k]) % mod;
            }
            if (i > 0)
            {
                t[i] = (t[i] + t[i - 1] + i * c[i - 1]) % mod;
                c[i] = (c[i] + c[i - 1]) % mod;
            }
        }
        WriteLine(t[^1]);
    }
}