#include<stdio.h>
 int main(){
	 int n;
	 while(scanf("%d",&n)!=EOF){
		 int i,j,a,b;
		 a=b=1;
		 
		 for(i=1;i<=n;++i){
             a=a+i-1;j=i;
			 for(j,b=a;j<=n;++j,b=b+j){
				 printf("%d",b);
				 if(j!=n)
					 printf(" ");
				 else
					 printf("\n");
			 }

		 }
	 }
 }