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.
Integer?PrimeQ]-1] (* _James C. McMahon's wiki page.
Integer?PrimeQ]-1] (* _James C. McMahon has authored 0 sequences.