Autonumber for several fixed rows

Question

I have often used the autonumber for dynamic row instances with no problem, but now have a problem where my table starts with 3 rows with different content, and the user needs to be able to add and delete rows, at the same time maintaining the autonumbering.
I created the table with three rows, and each row has the same name (Table1.Row) - I set the Binding to Repeat row with Initial Count set to 1 - no Minimum count
On a text field in that row, I use the Calculate event with
var vIndex = ["(a)", "(b)", "(c)"];
var i = this.parent.index;
this.rawValue = vIndex[i];
This produces rows with (a), (b) and (c)
I have a delete button for each row - Click event 
Table1.Row.instanceManager.setInstances(0)
- this deletes the row I click on
All good so far, but the autonumbering does not recalculate the remaining rows when I delete one.
Does anyone have an idea of how I can get the remaining rows to recalculate? I tried putting
  xfa.form.recalculate();
in various events, but no joy

Answer 1

Oh well - found my own solution. Same as the above, but
"On a text field in that row, I use the Layout:Ready event with
var vIndex = ["(a)", "(b)", "(c)"];
var i = this.parent.index;
this.rawValue = vIndex[i];
This produces rows with (a), (b) and (c)  - and the deletion works to remove the row and renumber the remaining ones.