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 | 59999999 |
| 2 | 69999899 |
| 3 | 69999989 |
| 4 | 78998999 |
| 5 | 88989899 |
| 6 | 88999979 |
| 7 | 89699999 |
| 8 | 89799989 |
| 9 | 89989799 |
| 10 | 89989979 |
| 11 | 89997899 |
| 12 | 89997989 |
| 13 | 89999699 |
| 14 | 89999969 |
| 15 | 97889999 |
| 16 | 98699999 |
| 17 | 98879999 |
| 18 | 98899799 |
| 19 | 98979989 |
| 20 | 98988899 |
| 21 | 98989889 |
| 22 | 98997989 |
| 23 | 98998979 |
| 24 | 98999969 |