#include<stdio.h>
#include<stdlib.h>

int main() {
   int n;
   scanf("%d",&n);
   if(n<0) {
       printf("Invalid Input");
       return 0;
   }
   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 bottem = size-1-i;
           int right = size-1-j;
           
           int min = top;
           if(left<min)=left;
           if(bottom<min)min=bottom;
           if(right<min)min=right;
           printf("%d",n-min);
   }
   printf("\n");
}
return 0;
}