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 | 3 |
| 3 | 16 |
| 4 | 75 |
| 5 | 361 |
| 6 | 1728 |
| 7 | 8281 |
| 8 | 39675 |
| 9 | 190096 |
| 10 | 910803 |
| 11 | 4363921 |
| 12 | 20908800 |
| 13 | 100180081 |
| 14 | 479991603 |
| 15 | 2299777936 |
| 16 | 11018898075 |
| 17 | 52794712441 |
| 18 | 252954664128 |
| 19 | 1211978608201 |
| 20 | 5806938376875 |
| 21 | 27822713276176 |
| 22 | 133306628004003 |
| 23 | 638710426743841 |
| 24 | 3060245505715200 |