#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(j+i<=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: hongguangxi
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2076 kb
****************************************************************/