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

int main(){
    cin.tie(0);
    ios_base::sync_with_stdio(0);
    //start here
    int N;cin >> N;
    for(int i = 1;i <= N;i++){
        for(int j = 1;j <= N;j++){
            if((i+j + (i > j))%2 == 0) cout << i << " ";
            else cout << j << " ";
        }
        cout << '\n';
    }
    for(int i = 1;i <= N;i++){
        for(int j = 1;j <= N;j++){
            if((i+j + (i > j))%2 == 1) cout << i << " ";
            else cout << j << " ";
        }
        cout << '\n';
    }
}