It is a dryer outlet. It is in my daughter's house. She lives in Gaylord MI, which seems to be a dead zone regarding EV charging of any kind. And that is odd since it is right along I75.
I don't want to have her change the outlet because then her dryer won't plug in any more. But I might have found some NEMA 14-50R to 10-50P adapters. I think that this would work. Tesla automatically adjust for the average available so whether or not it is 30 AMP or 50 AMP shouldn't matter (I think).
Thanks very much for your replies and suggestions so far. I my ideal world there would be any kind of EV charger in Gaylord. But maybe wishful thinking.