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 | 5 |
| 2 | 49 |
| 3 | 4801 |
| 4 | 46099201 |
| 5 | 4250272665676801 |
| 6 | 36129635465198759610694779187201 |
| 7 | 2610701117696295981568349760414651575095962187244375364404428801 |