#include <bits/stdc++.h>
using namespace std;

int main(){
	int i,j,n,a[20][20] = {0},t=1;
	cin>>n;
	for(i = 0;i< n;i++){
		for(j = 0;j < n - i;j++){
			a[j][j+i] = t;
			a[j+i][j] = t;
			t++;
		}
	}
	
	for(i = 0;i < n;i++){
		for(j = 0;j < n;j++){
			cout<<setw(5)<<a[i][j];
		}
		cout<<endl;
	}
    return 0;
}

/**************************************************************
	Problem: 1404
	User: admin
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/