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) |
|---|---|
| 2 | 2 |
| 3 | 6 |
| 4 | 2 |
| 5 | 24 |
| 6 | 2 |
| 7 | 622 |
| 8 | 2 |
| 9 | 2396 |
| 10 | 2 |
| 11 | 21912 |
| 12 | 2 |
| 13 | 527718 |
| 14 | 2 |
| 15 | 168484 |
| 16 | 2 |
| 17 | 13171730 |
| 18 | 2 |
| 19 | 359947864 |
| 20 | 2 |
| 21 | 52090778 |
| 22 | 2 |
| 23 | 16658818532 |
| 24 | 2 |
| 25 | 134257065348 |
| 26 | 2 |
| 27 | 61403998114 |
| 28 | 2 |