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 | 6 |
| 3 | 15 |
| 4 | 12 |
| 5 | 25 |
| 6 | 43 |
| 7 | 73 |
| 8 | 480 |
| 9 | 1981 |
| 10 | 3205 |
| 11 | 9038 |
| 12 | 16099 |
| 13 | 376340 |
| 14 | 211318 |
| 15 | 2461230 |
| 16 | 2253517 |
| 17 | 16907618 |
| 18 | 106308537 |
| 19 | 312911063 |