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 | 7 |
| 2 | 89 |
| 3 | 983 |
| 4 | 8969 |
| 5 | 98981 |
| 6 | 898987 |
| 7 | 9898921 |
| 8 | 89898983 |
| 9 | 989898989 |
| 10 | 8989898969 |
| 11 | 98989898981 |
| 12 | 898989898987 |
| 13 | 9898989898901 |
| 14 | 89898989898967 |
| 15 | 989898989898943 |
| 16 | 8989898989898969 |
| 17 | 98989898989898981 |
| 18 | 898989898989898943 |
| 19 | 9898989898989898789 |