You can download a 30-day trial of current versions (though 2016 is no longer the current version) directly from the Autodesk website.
Using the incorrect key for your specific version will result in an activation error, even if your serial number is valid. What is kuyhaa? product-keys-for-autodesk-2016-kuyhaa
While the 2016 version of Autodesk products may be older, the safest and most reliable way to use them is through official licensing. Avoid "kuyhaa" and similar sites to protect your computer and your professional work. You can download a 30-day trial of current
Autodesk offers free one-year educational access to students and educators for many of its products. product-keys-for-autodesk-2016-kuyhaa
You lose access to Autodesk’s official technical support and cloud services (like A360). How to Get Genuine Autodesk Software