#define _USE_MATH_DEFINES
#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <complex>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
#include <iterator>
using namespace std;

const int dy[] = {0, 1, 0, -1};
const int dx[] = {1, 0, -1, 0};

int main()
{
    int n;
    cin >> n;

    vector<vector<int> > v(n, vector<int>(n));
    int y = 0;
    int x = -1;
    int cnt = 1;
    for(int i=0; i<2*n-1; ++i){
        int len = (2 * n - i) / 2;
        for(int j=0; j<len; ++j){
            y += dy[i%4];
            x += dx[i%4];
            v[y][x] = cnt;
            ++ cnt;
        }
    }

    for(int i=0; i<n; ++i){
        cout << setw(3) << setfill('0') << v[i][0];
        for(int j=1; j<n; ++j)
            cout << ' ' << setw(3) << setfill('0') << v[i][j];
        cout << endl;
    }

    return 0;
}