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) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 11 |
| 5 | 13 |
| 6 | 50 |
| 7 | 81 |
| 8 | 96 |
| 9 | 395 |
| 10 | 640 |
| 11 | 59136 |
| 12 | 65719 |
| 13 | 632621 |
| 14 | 1342813 |
| 15 | 2137073 |
| 16 | 2755370 |
| 17 | 3446370 |
| 18 | 10860093 |
| 19 | 321939569 |
| 20 | 1872591111 |
| 21 | 8858043355 |