I just tried to run Dynamo in 2016 and it isn’t there. I checked both the Addins and Manage Tab but no luck. It does load fine with 2017. I downloaded the installer and when I tried to run it I got a message about having a newer version of Core & Revit installed already.
Revit 2016 Update 6 for R2 (build 16.0.1161.0 20160720_0715(x64)
Dynamo Core 126.96.36.19931
Dynamo Revit 188.8.131.5231