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 | 19899699 |
| 2 | 36969999 |
| 3 | 36999699 |
| 4 | 39699969 |
| 5 | 39999399 |
| 6 | 39999993 |
| 7 | 66699699 |
| 8 | 66798798 |
| 9 | 67967799 |
| 10 | 67987986 |
| 11 | 69759897 |
| 12 | 69889389 |
| 13 | 69966699 |
| 14 | 69996993 |
| 15 | 76668999 |
| 16 | 79488798 |
| 17 | 79866798 |
| 18 | 85994799 |
| 19 | 86686886 |
| 20 | 89769759 |
| 21 | 89866568 |