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