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 | 8712 |
| 2 | 9801 |
| 3 | 87912 |
| 4 | 98901 |
| 5 | 879912 |
| 6 | 989901 |
| 7 | 8799912 |
| 8 | 9899901 |
| 9 | 87128712 |
| 10 | 87999912 |
| 11 | 98019801 |
| 12 | 98999901 |
| 13 | 871208712 |
| 14 | 879999912 |
| 15 | 980109801 |
| 16 | 989999901 |
| 17 | 8712008712 |
| 18 | 8791287912 |
| 19 | 8799999912 |
| 20 | 9801009801 |
| 21 | 9890198901 |
| 22 | 9899999901 |
| 23 | 87120008712 |
| 24 | 87912087912 |
| 25 | 87999999912 |