I need to have 125 copies of a work sheet:

Sub Macro1()
For i = 1 To 125
Sheets("MD").Copy Befo=Sheets(1)
ActiveSheet.Name = "MD" & i
Next
End Sub

However, within each worksheet, certain cells must make reference to a cell
on another worksheet which for example is A2 from MASTER DATA sheet on sheet
MD1, A3 from MASTER DATA sheet on sheet MD2, etc. The formula below simply
copies the same data for each new sheet.

Range("A4:B4").Select
ActiveCell.FormulaR1C1 = "='MASTER DATA'!R[4]C"
End Sub

Any ideas as to how I can incorporate the sheet copy function and the
incremental cell reference formula are much appreciated! :)

Cheers.