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 | 9009 |
| 4 | 14841 |
| 5 | 76167 |
| 6 | 108801 |
| 7 | 239932 |
| 8 | 828828 |
| 9 | 886688 |
| 10 | 2112112 |
| 11 | 4663664 |
| 12 | 7152517 |
| 13 | 17333371 |
| 14 | 17511571 |
| 15 | 42844824 |
| 16 | 61200216 |
| 17 | 135666531 |
| 18 | 658808856 |
| 19 | 6953443596 |
| 20 | 6961551696 |
| 21 | 27110501172 |
| 22 | 46277277264 |
| 23 | 405162261504 |
| 24 | 483867768384 |
| 25 | 522733337225 |
| 26 | 588114411885 |