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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 8 |
| 4 | 24 |
| 5 | 83 |
| 6 | 324 |
| 7 | 1400 |
| 8 | 6609 |
| 9 | 33758 |
| 10 | 185136 |
| 11 | 1083233 |
| 12 | 6726366 |
| 13 | 44130128 |
| 14 | 304741623 |
| 15 | 2207682188 |
| 16 | 16729947276 |
| 17 | 132281116715 |
| 18 | 1088831511000 |
| 19 | 9311082630620 |
| 20 | 82569723552561 |
| 21 | 758057178490082 |
| 22 | 7194283782101844 |
| 23 | 70481938088367569 |