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 | 3 |
| 2 | 36 |
| 3 | 6336 |
| 4 | 10701720 |
| 5 | 169328019456 |
| 6 | 25013229623639712 |
| 7 | 34185168163500076044288 |
| 8 | 429209759636992944567490013280 |
| 9 | 49269599503729281688381600977015275520 |