#include<bits/stdc++.h>

using namespace std;
using ll = long long;

/*********************************/
template<class T> inline ostream& operator<<(ostream& os,vector<T> arr) {os << "["; for(int i = 0; i < (int)arr.size(); i++)os << arr[i] << (i == (int)arr.size() - 1 ? "]" : ",");os << endl;return os;}
template<typename A, typename B> ostream& operator<<(ostream& os, const pair<A,B>& p){os << "{" << p.first << "," << p.second << "}";return os; }
#define prvec(v) cerr<<#v<<": [";for(int __i = 0;__i < (int)(v).size(); __i++)cerr<<((v)[__i])<<(__i+1==(int)(v).size()?"]\n":",");
#define print(x) cerr<<#x<<": "<<(x)<<endl
/*********************************/

int main()
{
    int n; cin >> n;
    vector<int> a(n+1);
    for(int i = 0; i < n; i++)cin >> a[i+1];

    for(int i = 1; i <= n; i++)if(a[i] > i) {
        cout << "No" << endl;
        return 0;
    }

    for(int i = n; i >= 1; i--) {
        if(a[i] % i){cout << "No" << endl; return 0;}
        a[i - 1] += a[i] / i;
    }
    cout << "Yes" << endl;


}