3D modeling software "Metasequoia" official web site
Google and other search engines index these pages. By searching intitle:"index of" , you are asking the search engine to return pages that literally have "Index of" in the title tag—typically the standard header for Apache and Nginx directory trees.
find /vault/ -name "index+of+special+26"
, and I’ll provide a helpful, lawful response. If you meant something else by “special 26,” let me know.