#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
ll n;
int main()
{
	cin >> n;
	for(ll i = 0 ; i < n ; ++i)
	{
		ll num,input;
		ll minN = 1e18,min_num;
		cin >> num;
		bool ans = 1; 
		for(ll j = 1 ; j <= num ; ++j)
		{
			cin >> input;
			ll a = max((j-1)*2,(num-j)*2);
			if(a >= input || a == 1)
			{
				ans = 0;
			}
		}
		if(ans) cout << "YES" << endl;
		else cout << "NO" << endl;
	}
	return 0;
}