#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 = 1; i <= size; i++)
    {
        for (int j =1; j <= size; j++)
        {
            int top = i - 1;
            int left = j - 1;
            int bottom = size - i;
            int right = size - j;
            
            int minDist = top;
            if (left < minDist) minDist = left;
            if (bottom < minDist) minDist = bottom;
            if (right < minDist) minDIst = right;
            
            printf("%d", n - minDist);
        }
        if (i < size)
            printf("\n");
    }
    return 0;
}