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.
?(#<n-1&)]==0; Join[{0,1}, Select[ Range[2,1500],nniQ]] (* _Harvey P. Dale's wiki page.
?(#<n-1&)]==0; Join[{0,1}, Select[ Range[2,1500],nniQ]] (* _Harvey P. Dale has authored 0 sequences.