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) |
|---|---|
| 1 | 165 |
| 2 | 64005 |
| 3 | 6992962170388485 |
| 4 | 18446744047939747845 |