I may have noticed this on a certain other aggregator site once upon a time, but I'm still none the wiser as to why.
199 rows kind of makes sense for whatever a legitimate query might have been, but if you're going to make up a number, why 2^23? Why subtract? Am I metaphorically barking up the wrong tree?
Is this merely a mistyping of 8388608 and it was supposed to be ±1 row? Still the wrong (B-)tree?