Through an active AutoCAD subscription, you can download (e.g., AutoCAD 2022, 2021, 2020). Unfortunately, 2016 is too old — Autodesk only keeps installers for the last five releases.
The e‑book includes for each of the above, with before/after screenshots and code snippets for automation (e.g., a LISP routine that creates a parametric door block). Autodesk Autocad 2016 32 64 Bit Firstuploads.epub
Tip from the EPUB : For network installations, always deploy the version to the central server and let client workstations install the 32‑bit “thin client” (AutoCAD 2016 Lite) if older hardware cannot run 64‑bit. Through an active AutoCAD subscription, you can download (e