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 | 5 |
| 2 | 11 |
| 3 | 71 |
| 4 | 911 |
| 5 | 1609 |
| 6 | 2591 |
| 7 | 4339 |
| 8 | 15401 |
| 9 | 58309 |
| 10 | 59149 |
| 11 | 80989 |
| 12 | 208391 |
| 13 | 215389 |
| 14 | 496511 |
| 15 | 589189 |
| 16 | 1809079 |
| 17 | 1970149 |
| 18 | 3167569 |
| 19 | 3260809 |
| 20 | 3516109 |
| 21 | 5914369 |
| 22 | 9832271 |
| 23 | 12231311 |
| 24 | 13608071 |
| 25 | 14470061 |
| 26 | 16537151 |
| 27 | 16692551 |
| 28 | 19018369 |
| 29 | 19462661 |