#include <fstream>
using namespace std;ifstream fin("patrate2.in");ofstream fout("patrate2.out");int i,j,t,n,p[10101];
void m(int a){for(t=0,j=1;j<=p[0];++j){p[j]=p[j]*a+t,t=p[j]/10,p[j]%=10;}while(t){p[++p[0]]=t%10,t/=10;}}
int main(){p[0]=p[1]=1;for(fin>>n,i=2;i<=n;++i){m(i);}for(i=1;i<=n*n;i++){m(2);}for(i=p[0];i;i--){fout<<p[i];}return 0;}