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 | 0 |
| 2 | 2 |
| 3 | 4 |
| 4 | 11 |
| 5 | 28 |
| 6 | 55 |
| 7 | 94 |
| 8 | 475 |
| 9 | 2080 |
| 10 | 4835 |
| 11 | 5845 |
| 12 | 12338 |
| 13 | 20194 |
| 14 | 49529 |
| 15 | 56989 |
| 16 | 71546 |
| 17 | 77309 |
| 18 | 284330 |