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.
{10->2} = .repeat(0001), then (.repeat(0010))'s wiki page.
{10->2} = .repeat(0001), then (.repeat(0010)) has authored 0 sequences.