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 | 9 |
| 2 | 99 |
| 3 | 1287 |
| 4 | 19305 |
| 5 | 328185 |
| 6 | 6235515 |
| 7 | 130945815 |
| 8 | 3011753745 |
| 9 | 75293843625 |
| 10 | 2032933777875 |
| 11 | 58955079558375 |
| 12 | 1827607466309625 |
| 13 | 60311046388217625 |
| 14 | 2110886623587616875 |
| 15 | 78102805072741824375 |
| 16 | 3046009397836931150625 |