#include namespace { #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Wunused-function" #include #pragma GCC diagnostic pop using namespace std; using namespace atcoder; #define rep(i,n) for(int i = 0; i < (int)(n); i++) #define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--) #define all(x) begin(x), end(x) #define rall(x) rbegin(x), rend(x) template bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; } template bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; } using ll = long long; using P = pair; using VI = vector; using VVI = vector; using VL = vector; using VVL = vector; using mint = modint998244353; } int main() { ios::sync_with_stdio(false); cin.tie(0); int n; cin >> n; using A = array; A dp; dp[0] = 1; rep(i, n) { // i + x A ndp; rep(j, 4) ndp[j] += dp[j] * (i + 1); rep(j, 3) ndp[j+1] += dp[j]; dp = ndp; } mint s1 = dp[1]; mint s2 = dp[2] * 2 + dp[1]; mint s3 = dp[3] * 6 + 3 * s2 - 2 * s1; cout << s3.val() << '\n'; }