Numbers always INDIRECT same cell from previous sheet
How to reference to always indirect the same cell for the previos sheet?
example sheet 1, sheet 2, sheet3...
sheet 2 c3=sheet 1 a1 + sheet 2 a2
sheet 3 c3=sheet 2 a1 + sheet 3 a2
sheet 4 c3=sheet 3 a1 + sheet 4 a2
and so on as a formula could copy to the next sheet # c3 maintaining the same, thanks