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 | 2 |
| 2 | 89 |
| 3 | 97 |
| 4 | 809 |
| 5 | 907 |
| 6 | 8009 |
| 7 | 8699 |
| 8 | 9697 |
| 9 | 9887 |
| 10 | 81119 |
| 11 | 98887 |
| 12 | 8000009 |
| 13 | 9888887 |
| 14 | 81111119 |
| 15 | 8111111119 |
| 16 | 8666699999 |
| 17 | 9888888887 |
| 18 | 8000000000009 |
| 19 | 9888888888887 |
| 20 | 98888888888888887 |
| 21 | 81111111111111111119 |
| 22 | 800000000000000000009 |