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