#include<bits/stdc++.h>
using namespace std;
int n,c=1;
int a[25][25];
int main(){
	cin>>n;
  for(int i=n;i>=1;i--){
  for(int j=1;j<=n;j++){
  	a[i][j]=c++;
  }
  }
   for(int i=1;i<=n;i++){
  for(int j=1;j<=n;j++){
  cout<<setw(3)<<a[i][j];
  }
  cout<<endl;
  }
  
	return 0;
}

/**************************************************************
	Problem: 1185
	User: wangyousi
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2076 kb
****************************************************************/