x13as binary package in Ubuntu Focal ppc64el

 X-13ARIMA-SEATS is a seasonal adjustment software produced, distributed, and
 maintained by the Census Bureau, U.S. Department of Commerce.
 .
 Features include:
  - Extensive time series modeling and model selection capabilities for linear
    regression models with ARIMA errors (regARIMA models);
  - The capability to generate ARIMA model-based seasonal adjustment using a
    version of the SEATS procedure originally developed by Victor Gómez and
    Agustín Maravall at the Bank of Spain as well as nonparametric adjustments
    from the X-11 procedure;
  - Diagnostics of the quality and stability of the adjustments achieved under
    the options selected;
  - The ability to efficiently process many series at once.

Source package