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 | 84 |
| 3 | 919 |
| 4 | 9744 |
| 5 | 99375 |
| 6 | 998704 |
| 7 | 9997599 |
| 8 | 99995904 |
| 9 | 999993439 |
| 10 | 9999990000 |
| 11 | 99999985359 |
| 12 | 999999979264 |
| 13 | 9999999971439 |
| 14 | 99999999961584 |
| 15 | 999999999949375 |
| 16 | 9999999999934464 |
| 17 | 99999999999916479 |
| 18 | 999999999999895024 |