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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 14 |
| 5 | 43 |
| 6 | 197 |
| 7 | 850 |
| 8 | 4154 |
| 9 | 20371 |
| 10 | 103405 |
| 11 | 530355 |
| 12 | 2760533 |
| 13 | 14499363 |
| 14 | 76842876 |
| 15 | 410164367 |
| 16 | 2203491401 |
| 17 | 11903591737 |