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.
i^t_i), one can consider "converse" sequence {s(n)}, where s(n) = Product's wiki page.
i^t_i), one can consider "converse" sequence {s(n)}, where s(n) = Product has authored 0 sequences.