#nullable enable

const int Mod = 998244353;
var n = int.Parse(Console.ReadLine()!);

var fac = new long[n + 1];
fac[0] = 1;
for (var i = 1; i <= n; i++) fac[i] = fac[i - 1] * i % Mod;
var ans = 0L;
var l = Math.Max(3, n + 1);
var f = new long[l];
f[0] = f[2] = 1;
f[1] = 2;
for (var k = 1; k <= n; k++)
{
    ans += f[n - k] * fac[n - k] % Mod * fac[k] % Mod;
    var g = new long[l];
    for (var i = 0; i < l - 1; i++)
    {
        g[i + 1] += f[i];
        if (i + 2 < l) g[i + 2] += f[i];
    }
    f = g;
}
Console.WriteLine(ans);