#include<bits/stdc++.h>
using namespace std;
int n,a[20][20]; 
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
	    for(int j=1;j<=n;j++){
			if(i+j<=n+1)a[i][j]=i+j-1;
			else a[i][j]=2*n-(i+j)+1; 
		}
		
	}
		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: 1193
	User: zhuanghaoxiang
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2076 kb
****************************************************************/