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 | 99 |
| 3 | 362 |
| 4 | 636 |
| 5 | 713 |
| 6 | 922 |
| 7 | 999 |
| 8 | 8904 |
| 9 | 9999 |
| 10 | 81817 |
| 11 | 99999 |
| 12 | 336632 |
| 13 | 663366 |
| 14 | 999999 |
| 15 | 7272726 |
| 16 | 9999999 |
| 17 | 76470588 |
| 18 | 99999999 |
| 19 | 333666332 |
| 20 | 405436667 |
| 21 | 428571428 |
| 22 | 447710184 |
| 23 | 454545453 |
| 24 | 473684210 |
| 25 | 526315788 |
| 26 | 545454545 |
| 27 | 552289814 |