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.
)} 1,3,7,9); } say a266141($'s wiki page.
)} 1,3,7,9); } say a266141($ has authored 0 sequences.