#define N 19
#include<stdio.h>
void main()
{
  int a[N][N]={0},i,j,n,x,y;
  scanf("%d",&n);
  x=0,y=(n-1)/2;
  a[x][y]=1;
  for(i=1;i<n*n;i++)
    {
      if(x!=0&&y!=n-1&&a[x-1][y+1]==0)
 {
   a[x-1][y+1]=a[x][y]+1;
   x--;
   y++;
   continue;
 }
      if(x==0)
 {
   if(y==n-1)
     {
       a[x+1][y]=a[x][y]+1;
       x++;
       continue;
     }
   else
     {
       a[x+n-1][y+1]=a[x][y]+1;
       x+=n-1;
       y++;
       continue;
     }
 }
      if(y==(n-1))
 {
   if(x==0)
     {
       a[x+1][y]=a[x][y]+1;
       x++;
       continue;
     }
   else
     {
       a[x-1][y-(n-1)]=a[x][y]+1;
       x--;
       y-=n-1;
       continue;
     }
 }
      if(a[x-1][y+1]!=0)
 {
   a[x+1][y]=a[x][y]+1;
   x++;
   continue;
 }
    }
  for(i=0;i<n;i++)
    {
      for(j=0;j<n;j++)
 printf("%4d",a[i][j]);
      printf("/n");
    }
}