#include <bits/stdc++.h>
using namespace std;
const int N = 300100;
int arr[N];
#pragma warning(disable : 6031)
#pragma warning(disable : 4996)
int t, n;
bool c1[N], c2[N];
int main() {
  scanf("%d", &t);
  while (t--) {
    scanf("%d", &n);
    bool f1 = 1, f2 = 1;
    bool f3 = 1;
    for (int i = 1; i <= n; i++) scanf("%d", arr + i);
    memset(c1, 0, sizeof c1);
    memset(c2, 0, sizeof c2);
    c1[1] = 1;
    for (int i = 2; i <= n; i++) {
      if (c1[i - 1] && arr[i] >= i - 1) {
        c1[i] = 1;
      } else {
        break;
      }
    }
    c2[n] = 1;
    for (int i = n - 1; i >= 1; i--) {
      if (c2[i + 1] && arr[i] >= n - i) {
        c2[i] = 1;
      } else
        break;
    }
    f1 = c1[n];
    f2 = c2[1];
    f3 = 0;
    for (int i = 1; i <= n; i++) {
      if (c1[i] && c2[i]) {
        f3 = 1;
      }
    }
    if (f1 || f2 || f3)
      puts("Yes");
    else
      puts("No");
  }
  return 0;
}
