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 | 92 |
| 3 | 973 |
| 4 | 9936 |
| 5 | 99875 |
| 6 | 999784 |
| 7 | 9999657 |
| 8 | 99999488 |
| 9 | 999999271 |
| 10 | 9999999000 |
| 11 | 99999998669 |
| 12 | 999999998272 |
| 13 | 9999999997803 |
| 14 | 99999999997256 |
| 15 | 999999999996625 |
| 16 | 9999999999995904 |
| 17 | 99999999999995087 |
| 18 | 999999999999994168 |
| 19 | 9999999999999993141 |
| 20 | 99999999999999992000 |