#include<bits/stdc++.h>
using namespace std;
int n,m[1000][1000];
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			m[i][n+1-j]=(j-1)*n+i;
		}
	}
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			cout<<setw(3)<<m[i][j];
		}
		cout<<endl;
	}
}
/**************************************************************
	Problem: 1187
	User: zhengzihao
	Language: C++
	Result: Accepted
	Time:19 ms
	Memory:5980 kb
****************************************************************/