#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;i<size;j++){
        int top=i;
        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");
    }
}