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 | 2 |
| 4 | 7 |
| 5 | 9 |
| 6 | 43 |
| 7 | 59 |
| 8 | 338 |
| 9 | 490 |
| 10 | 3097 |
| 11 | 4639 |
| 12 | 31283 |
| 13 | 48107 |
| 14 | 338553 |
| 15 | 531469 |
| 16 | 3857036 |
| 17 | 6157068 |
| 18 | 45713546 |
| 19 | 73996100 |