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.
)==12 } @{twin_primes(1e6)}; # _Dana Jacobsen's wiki page.
)==12 } @{twin_primes(1e6)}; # _Dana Jacobsen has authored 0 sequences.