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 | 8 |
| 2 | 9 |
| 3 | 98 |
| 4 | 99 |
| 5 | 361 |
| 6 | 635 |
| 7 | 712 |
| 8 | 921 |
| 9 | 998 |
| 10 | 999 |
| 11 | 8903 |
| 12 | 9998 |
| 13 | 9999 |
| 14 | 81816 |
| 15 | 99998 |
| 16 | 99999 |
| 17 | 336631 |
| 18 | 663365 |
| 19 | 999998 |
| 20 | 999999 |
| 21 | 7272725 |
| 22 | 9999998 |
| 23 | 9999999 |
| 24 | 76470587 |
| 25 | 99999998 |
| 26 | 99999999 |
| 27 | 333666331 |
| 28 | 405436666 |
| 29 | 428571427 |
| 30 | 447710183 |
| 31 | 454545452 |