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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 5 |
| 7 | 11 |
| 8 | 26 |
| 9 | 55 |
| 10 | 214 |
| 11 | 547 |
| 12 | 1802 |
| 13 | 6579 |
| 14 | 22446 |
| 15 | 77170 |
| 16 | 401150 |
| 17 | 1509788 |
| 18 | 7198829 |
| 19 | 36540168 |