[Toadtoad]

Okay, I tried a few things out and I think I understand what happened. "\" is "I'm Feeling Lucky" for a search. You can even see this in regular DuckDuckGo, for example if you search "\wikipedia". The "\+" part is more of an coincidence. If you search "\+" with the quotes[0], you can see that the Clark County page is one of the first results. So, it appears that the query "\\+" is asking to search "\+" and open the top result, and that link just happens to be the result (even if it appears seconded when searching for an exact instance of "\+").

[0] https://duckduckgo.com/?q=%22%5C%2B%22&t=h_&ia=web

[tyingq]

Ah, okay. It's a different suburban Las Vegas house every time too, which is also odd. Same on the regular ddg website. The "parcelid" changes for each search of "\+" on their site.