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.
{t^n = a_n} = 0 and P(j,a.)P(k,a.) = P(j,t)P(k,t)|'s wiki page.
{t^n = a_n} = 0 and P(j,a.)P(k,a.) = P(j,t)P(k,t)| has authored 0 sequences.