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 | 2 |
| 3 | 5 |
| 4 | 18 |
| 5 | 59 |
| 6 | 306 |
| 7 | 1861 |
| 8 | 15097 |
| 9 | 146893 |
| 10 | 1693416 |
| 11 | 22239872 |
| 12 | 327670703 |