#include <bits/stdc++.h>
using namespace std;
int main(){
    int i,j,n,a[15][15]={0};
    cin>>n;
    for(i=0;i<n;i++){
        for(j=0;j<n-i;j++){
            a[i][j]=n-i;
        }
        for(j=n-1;j>=i;j--){
            a[j][n-1-i]=n-i;
        }
    }
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            cout<<setw(3)<<a[i][j];
        }
        cout<<endl;
    }
     return 0;
} 

/**************************************************************
	Problem: 1202
	User: panjinyan
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/