Is there a way I can search observations by quantity?

I’d like to see how many species have been recorded in my state that are represented by a single observation. I can’t seem to find the appropriate filters if there are any.

Arkansas has 2348 species with a single observation:
(You’ll have to go to page 5 to see the end of species with 1 observation.)

This isn’t a function built into the website, you have to use the API.