#define _GLIBCXX_DEBUG
#define ll long long
#include <bits/stdc++.h>
using namespace std;
using Graph = vector<vector<int>>;

int main(){
  int N; cin >> N;
  vector<vector<int>> A(N+2, vector<int>(N+2, -1));
  A[1][1] = 1;
  int y = 1, x = 1;
  char D = 'R';
  for(int i = 2; i <= N*N; i++){
    switch(D){
      case 'R':
        x++;
        A[y][x] = i;
        if(x == N or A[y][x+1] != -1){
          D = 'D';
        }
        break;
      case 'D':
        y++;
        A[y][x] = i;
        if(y == N or A[y+1][x] != -1){
          D = 'L';
        }
        break;
      case 'L':
        x--;
        A[y][x] = i;
        if(x == 1 or A[y][x-1] != -1){
          D = 'U';
        }
        break;
      case 'U':
        y--;
        A[y][x] = i;
        if(y == 1 or A[y-1][x] != -1){
          D = 'R';
        }
        break;
    }
  }
  for(int i = 1; i <= N; i++){
    for(int j = 1; j <= N; j++){
      if(j == N){
        printf("%03d\n", A[i][j]);
      }else{
        printf("%03d ", A[i][j]);
      }
    }
  }
}