This morning I was looking at Google Analytics and found a series of pageviews for

/page/2/
/page/3/
/page/4/ etc.

These all seem to load my home page. The source for these is direct, but I can't imagine where they would come from.

I looked back and saw a handful of these in June and early July, then nothing for a while. Then earlier this month it started happening again. Last week there were thousands of them.

Does anyone have experience with this, or any idea what may be happening?