#include <bits/stdc++.h>
using namespace std;
int main() {
  long long t;
  cin >> t;
  while (t--) {
    long long n;
    cin >> n;
    long long arr[n];
    for (long long i = 0; i < n; i++) cin >> arr[i];
    long long p = 0;
    while (p < n) {
      if (arr[p] < p) break;
      p++;
    }
    --p;
    long long s = n - 1;
    while (s >= 0) {
      if (arr[s] < n - s - 1) break;
      s--;
    }
    ++s;
    if (s <= p || (s == p + 1 && arr[s] != arr[p]))
      cout << "Yes";
    else
      cout << "No";
    cout << "\n";
  }
  return 0;
}
