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 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 6 |
| 6 | 19 |
| 7 | 20 |
| 8 | 111 |
| 9 | 116 |
| 10 | 567 |
| 11 | 641 |
| 12 | 4718 |
| 13 | 4772 |
| 14 | 35489 |
| 15 | 46012 |
| 16 | 389277 |
| 17 | 487408 |
| 18 | 4616580 |