This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
?(DayName[ #]==Friday&)]==53&&Count[DayRange[{y,1,1},{y,12,31}],'s wiki page.
?(DayName[ #]==Friday&)]==53&&Count[DayRange[{y,1,1},{y,12,31}], has authored 0 sequences.