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 | 0 |
| 2 | 9 |
| 3 | 405 |
| 4 | 6750 |
| 5 | 83736 |
| 6 | 922347 |
| 7 | 9639783 |
| 8 | 98361900 |
| 9 | 992660346 |
| 10 | 9967494609 |
| 11 | 99857394225 |
| 12 | 999379243674 |
| 13 | 9997315646220 |
| 14 | 99988457276295 |
| 15 | 999950607877131 |
| 16 | 9999789546603672 |
| 17 | 99999106646803758 |
| 18 | 999996220428781005 |
| 19 | 9999984057081398901 |
| 20 | 99999932929790707494 |