#include<iostream>
#include<vector>
using namespace std;
const vector<int> dx = {1, 0, -1, 0};
const vector<int> dy = {0, -1, 0, 1};
int main() {
  int N;
  cin >> N;
  vector<vector<int>> A(N, vector<int>(N, 0));
  int H = 0, W = 0;
  int d = 0;
  for (int i = 1; i <= N * N; i++) {//ループ回数は決まっている。
    A[H][W] = i;
    if (i == N * N) break;
    while (1) {
      int nh = H + dy[d], nw = W + dx[d];
      if (0 <= nh && nh < N && 0 <= nw && nw < N && A[nh][nw] == 0) {
        H = nh, W = nw;
        break;
      }
      d++;
      d %= 4;
    }
  }
  for (int i = 0; i < N; i++) {
    for (int j = 0; j < N; j++) {
      printf("%03d", A[i][j]);
      if (j == N - 1) {
        printf("\n");
      } else {
        printf(" ");
      }
    }
  }
}