#include<iostream>
#include<algorithm>
#include<stdio.h>
#include<stdlib.h>
#include<vector>
#include<string>
#include<sstream>
using namespace std;


int main(){

  int n;
  cin >> n;

  vector<vector<int> > a(n+2,vector<int>(n+2));
  for(int i=0;i<n+2;i++){
    a[i][0] = -1;
    a[0][i] = -1;
    a[i][n+1] = -1;
    a[n+1][i] = -1;
  }

  int cnt = 1;
  int x=1,y=1;
  int i=0;
  while(cnt <= n*n){
    int dx[4] = {1,0,-1,0};
    int dy[4] = {0,1,0,-1};

    if( a[x+dx[i]][y+dy[i]] != 0 ){
      i++;
      i = i%4;
    }

    if( a[x][y] == 0 ){
      a[x][y] = cnt;
      cnt++;
      x += dx[i];
      y += dy[i];
    }

  }

  for(int i=1;i<n+1;i++){
    for(int j=1;j<n+1;j++){
      if(a[j][i] < 10){
        printf("00%d ",a[j][i]);
      }else if(a[j][i] < 100){
        printf("0%d ",a[j][i]);
      }else{
        printf("%d ",a[j][i]);        
      }
    }
    printf("\n");
  }









  return 0;
}