#include<stdio.h>
int main()
  {
      int n;
      scanf("%d",&n);
      if(n<0)
      {
          printf("invalid Input");
      }
      int size=2*n-1;
      for (int i=0;i<size;i++)
      {
          for (int j=0;j<size;j++)
          {
              int top =i;
              int left =j;
              int right=size-1-j;
              int bottom=size-1-i;
              int minDis=top;
              if(left <minDist) minDist=left;
              if(right<minDist) minDist=right;
              if(bottom<minDist) minDist=bottom;
              printf("%d",n-minDist);
              }
          printf("\n");
      }
      return 0;
  }