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 = det[Jacobi(i^2 + c*i*j + d*j^2, n)]'s wiki page.
n = det[Jacobi(i^2 + c*i*j + d*j^2, n)] has authored 0 sequences.