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 | 6 |
| 4 | 9 |
| 5 | 39 |
| 6 | 418 |
| 7 | 448 |
| 8 | 1736 |
| 9 | 2244 |
| 10 | 3130 |
| 11 | 3812 |
| 12 | 5344 |
| 13 | 5658 |
| 14 | 5680 |
| 15 | 8409 |
| 16 | 9096 |
| 17 | 11292 |
| 18 | 21060 |