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 | 2 |
| 2 | 3 |
| 3 | 8 |
| 4 | 24 |
| 5 | 71 |
| 6 | 236 |
| 7 | 835 |
| 8 | 3182 |
| 9 | 12302 |
| 10 | 48834 |
| 11 | 195035 |
| 12 | 785280 |
| 13 | 3167322 |
| 14 | 12808531 |
| 15 | 51834644 |
| 16 | 209965222 |
| 17 | 850817523 |
| 18 | 3449091525 |