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.
?(# > 1 &)][[1]]]; f[2] = f[3] = 1; seq[len's wiki page.
?(# > 1 &)][[1]]]; f[2] = f[3] = 1; seq[len has authored 0 sequences.