public boolean tripleUp(int[] nums) {
  for (int i = 0; i < nums.length-2; i++) {
    int n1 = nums[i];
    int n2 = nums[i+1];
    int n3 = nums[i+2];
    if (n1 + 1 == n2 && n2 + 1 == n3) {
      return true;
    }
  }
  return false;
}