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 | a(n) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 2304 |
| 3 | 584325558976905216 |
| 4 | 35313389841821364727572472840336561596134691007780285818034354666813122266941990584103364198400 |