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 | 1 |
| 3 | 1 |
| 4 | 11 |
| 5 | 13 |
| 6 | 77 |
| 7 | 29 |
| 8 | 459 |
| 9 | 341 |
| 10 | 3349 |
| 11 | 251 |
| 12 | 32891 |
| 13 | 28271 |
| 14 | 395243 |
| 15 | 420983 |
| 16 | 74587 |
| 17 | 158183 |
| 18 | 2833255 |
| 19 | 853661 |
| 20 | 3407275 |
| 21 | 77976391 |
| 22 | 27223837 |
| 23 | 28399557 |
| 24 | 1814074083 |
| 25 | 5665315119 |
| 26 | 29397421371 |
| 27 | 27452509171 |
| 28 | 85332099113 |
| 29 | 88200436013 |