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.
?(And @@ PrimeQ[# + {-1, 1}] &)]; Array[a, 20] (* _Amiram Eldar's wiki page.
?(And @@ PrimeQ[# + {-1, 1}] &)]; Array[a, 20] (* _Amiram Eldar has authored 0 sequences.