// editor5
#include<stdio.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 bottom=size-1-i;
            int right=size-1-j;
            int min=top;
            if(left<min)min=left;
            if(bottom<min)min=bottom;
            if(right<min)min=right;
            printf("%d",n-min);
        }
        printf("\n");
    }
    return 0;
}