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.
?(#>0 &)]]; Table[CountPrimes[n], {n,100}] (* _T. D. Noe's wiki page.
?(#>0 &)]]; Table[CountPrimes[n], {n,100}] (* _T. D. Noe has authored 0 sequences.