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 | 1 |
| 2 | 15 |
| 3 | 1 |
| 4 | 575 |
| 5 | 65 |
| 6 | 8 |
| 7 | 5845 |
| 8 | 865 |
| 9 | 175 |
| 10 | 27 |
| 11 | 874853 |
| 12 | 153713 |
| 13 | 39743 |
| 14 | 9963 |
| 15 | 1728 |
| 16 | 1009743 |
| 17 | 200403 |
| 18 | 60333 |
| 19 | 19153 |
| 20 | 5368 |
| 21 | 1000 |
| 22 | 389919909 |
| 23 | 84873489 |
| 24 | 28400079 |
| 25 | 10419739 |
| 26 | 3681784 |
| 27 | 1105000 |
| 28 | 216000 |
| 29 | 3449575767 |
| 30 | 807843807 |
| 31 | 292420227 |