#include <stdio.h>
int M[31][31];
int main() {
  int N;
  scanf("%d",&N);
  int i,j;
  for (i=0; i<=N; i++) {
    for (j=0; j<=N; j++) {
      M[i][j] = 0;
    }
  }
  int c = 1;
  i = 0;
  for (j=0; j<N; j++) {
    M[i][j] = c++;
  }
  j = N-1;
  for (i=1; i<N; i++) {
    M[i][j] = c++;
  }
  i = N-1;
  for (j=N-2; j>=0; j--) {
    M[i][j] = c++;
  }
  j = 0;
  for (i=N-2; i>=1; i--) {
    M[i][j] = c++;
  }
  int stpi[4] = { 0,1,0,-1 };
  int stpj[4] = { 1,0,-1,0 };
  int k = 0;
  int rtry = 0;
  i = 1;
  j = 1;
  while (1) {
    M[i][j] = c++;
    RTRY:
    i += stpi[k];
    j += stpj[k];
    if (M[i][j] != 0) {
      i -= stpi[k];
      j -= stpj[k];
      k++;
      k%=4;
      rtry++;
      if (rtry >= 3) {
        break;
      } else {
        goto RTRY;
      }
    }
    rtry = 0;
  }
  for (i=0; i<N; i++) {
    for (j=0; j<N; j++) {
      printf("%03d",M[i][j]);
      if (j<N-1) {
        printf(" ");
      } else {
        printf("\n");
      }
    }
  }
  return 0;
}