#include<bits/stdc++.h>
using namespace std;
int n,a[20][20],i,j;
int main(){
    cin>>n;
    for(i=1;i<=n;i++){
        for(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(i=1;i<=n;i++){
        for(j=1;j<=n;j++){
        cout<<setw(3)<<a[i][j];
    }
    cout<<endl;
}
}
/**************************************************************
	Problem: 1193
	User: yangjunwen
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2076 kb
****************************************************************/