#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(intj=1;j<=size;j++)
        {
            int top = i - 1;
            int left = j - 1;
            int bottom = size - i;
            int right = size - 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;
}