Okla. Stat. tit. 58 § 631
Upon the final settlement of the accounts of the executor or administrator, or at any subsequent time, upon the application of the executor or administrator, or of any heir, legatee, or devisee, the court must proceed to distribute the residue of the estate in the hands of the executor or administrator, if any, among the persons who by law are entitled thereto, and if the decedent has left a surviving child, and the issue of other children, and any of them, before the close of administration, have died while under age and not having been married, no administration on such deceased child's estate is necessary, but all the estate which such deceased child was entitled to by inheritance, must, without administration, be distributed in accordance with the laws of descent and distribution of this state. A statement of any receipts and disbursements of the executor or administrator, since the rendition of his final accounts, must be reported and filed at the time of making such distribution, and a settlement thereof, together with an estimate of the expenses of closing the estate, must be made by the court and included in the order or decree, or the court or judge may order notice of the settlement of such supplementary account, and refer the same as in other cases of settlement of accounts.
Okla. Stat. tit. 58, § 631