title: I want to give an ID to each row. How do I do this with a formula?
body: <p>I want each row in the table to have unique number. </p>
  
  <p>Here is my story:<br>
  1. I create table and give IDs to rows - 1, 2, 3, 4, 5.<br>
  2. I sort and filter rows by values in other columns.<br>
  3. I add new row and want to give number to it. I do not see that next number is 6.  </p>
  
  <p>Is there any way to automate the process?</p>