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

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

int in_range( int n, int x, int y ){
  return 0 <= x and x < n and 0 <= y and y < n;
}

signed main(){
  int N; cin >> N;
  vector< vector< int > > G( N, vector< int >( N ) );
  int x = 0, y = 0, d = 0;
  for( int i = 1; i <= N * N; ++i ){
    G[ x ][ y ] = i;
    if( not in_range( N, x + dx[ d ], y + dy[ d ] ) or G[ x + dx[ d ] ][ y + dy[ d ] ] )
      ++d, d %= 4;
    x += dx[ d ], y += dy[ d ];
  }
  for( int i = 0; i < N; ++i )
    for( int j = 0; j < N; ++j )
      printf( "%03d%c", G[ i ][ j ], " \n"[ j + 1 == N ] );
  return 0;
}