#include<iostream>
using namespace std;
void printTree(int N){
    if(N>0){
        cout<<"Invalid input";
        return 0;
    }
    for(int i=1;i<=N;i++){
        cout<<" ";
    
    for(int star=1;star<=(2*i=i);star++){
        cout<<" ";
    }
    cout<<endl;}
}
int main(){
    int N;
    cin>>N;
    printTree(N);
    return 0;
}