#include <stdio.h>
#include <stdlib.h>

int mian(){
    int n;
    scanf("%d",&n);
    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 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;
}