#include <bits/stdc++.h>
using namespace std;
int N[22][22];
//右下左上
int dx[] = {0,1,0,-1};
int dy[] = {1,0,-1,0};
int main(){
    int n;
    cin >> n;
    int x = 1;
    int y = 1;
    int d = 0;
    for(int i = 1;i<=n*n;i++){
        N[x][y] = i;
        x = x + dx[d];
        y = y + dy[d];
        //如果越界
        if(x < 1 || x > n ||y <1||y>n || N[x][y] != 0){
            x =x - dx[d];
            y =y - dy[d];
            d++;
            if(d == 4)d=0;
            x =x + dx[d];
            y =y + dy[d];
        }
    }
    for(int i = 1;i<=n;i++){
        for(int j = 1;j<=n;j++){
            cout<<setw(3)<< N[x][y]<< " ";
        }
        cout << endl;
    }







    return 0;
}