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 | 1 |
| 2 | 9 |
| 3 | 599 |
| 4 | 38359 |
| 5 | 2454999 |
| 6 | 628479869 |
| 7 | 643563386359 |
| 8 | 41188056726999 |
| 9 | 168706280353789919 |
| 10 | 43188807770570219359 |
| 11 | 2764083697316494039005 |
| 12 | 2830421706052089895941623 |
| 13 | 46373629231957440855107559295 |