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 | 9 |
| 2 | 97 |
| 3 | 905 |
| 4 | 8913 |
| 5 | 88921 |
| 6 | 888929 |
| 7 | 8888937 |
| 8 | 88888945 |
| 9 | 888888953 |
| 10 | 8888888961 |
| 11 | 88888888969 |
| 12 | 888888888977 |
| 13 | 8888888888985 |
| 14 | 88888888888993 |
| 15 | 888888888889001 |
| 16 | 8888888888889009 |
| 17 | 88888888888889017 |
| 18 | 888888888888889025 |
| 19 | 8888888888888889033 |
| 20 | 88888888888888889041 |
| 21 | 888888888888888889049 |
| 22 | 8888888888888888889057 |