UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM 24F-2
                        Annual Notice of Securities Sold
                             Pursuant to Rule 24f-2

1.    Name and address of issuer:
      Oppenheimer Series Fund, Inc.
      2 World Trade Center
      New York, New York 10048

2.    Name of each  series or class of  securities  for which this Form is filed
      (If the Form is being filed for all series and class of  securities of the
      issuer, check the box but do not list series or classes): / /

      Oppenheimer LifeSpan Balanced Fund  Class A Shares

3.    Investment Company Act File Number :          811-3346
      Securities Act File Number:   2-75276

4(a). Last day of fiscal year for which this Form is filed: 6/12/98 (date ceased
operations)

4(b). / / Check  box if this  Form is  being  filed  late  (i.e.,  more  that 90
      calendar days after the end of the issuer's fiscal year). (See instruction
      A.2)

4(c).  / / Check box if this is the last  time the  issuer  will be filing  this
Form.

5. Calculation of registration fee:

     (i) Aggregate sale price of securities sold during the fiscal year pursuant
     to section 24(f): $ 12,594,566

     (ii)  Aggregate  price of  securities  redeemed or  repurchased  during the
       fiscal year: $ 68,297,250

     (iii)Aggregate price of securities redeemed or repurchased during any prior
      fiscal  year  ending  no  earlier  than  October  11,  1995  that were not
      previously used to reduce  registration fees payable to the Commission:  $
      -0-

     (iv) Total  available  redemption  credits [add items 5(ii) and 5(iii)]:  $
     68,297,250








     (v) Net sales - if Item 5(i) is  greater  than Item  5(iv)  [subtract  Item
      5(iv) from Item 5(i)]: $ N/A

     (vi) Redemption  credits  available for use in future years -- if Item 5(i)
      is less than Item 5(iv) [subtract Item 5(iv from Item 5(i)]: $ -0-

     (vii)Multiplier  for determining  registration fee (See Instructions  C.9):
     x.000295

     (viii)Registration  fee due [multiple  Item 5(v) by Item 5(vii)] (enter "0"
     if no fee is due): $ -0-

6.    Prepaid Shares:

      If the  response to Item 5(i) was  determined  by  deducting  an amount of
      securities that were registered  under the Securities Act of 1933 pursuant
      to rule 24e-2 as in effect before October 11, 1997, then report the amount
      of securities  (number of shares or other units)  deducted  here:  -0-. If
      there is a number of shares or other units that were  registered  pursuant
      to rule 24e-2  remaining  unsold at the end of the  fiscal  year for which
      this  form is filed  that are  available  for use by the  issuer in future
      fiscal years, then state that number here: -0-.

7. Interest due:

     If this Form is being filed more than 90 days after the end of the issuer's
     fiscal year (see Instruction D): N/A

8.    Total of the  amount of the  registration  fee due plus any  interest  due
      [line 5(viii) plus line 7]: $ -0-

9.    Date  the  registration  fee  and any  interest  payment  was  sent to the
      Commission's lockbox depository:

      Method of Delivery:  N/A

                                  SIGNATURES

This  report has been  signed  below by the  following  persons on behalf of the
issuer and in the capacities and on the dates indicated.

By:   /s/ Robert J. Bishop
      Robert J. Bishop, Assistant Treasurer

Date:  August 31, 1998

cc:   Ron Feiman, Esq.
      Katherine P. Feld, Esq.
      Gloria LaFond