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 | 11 |
| 3 | 133 |
| 4 | 1595 |
| 5 | 19141 |
| 6 | 229691 |
| 7 | 2756293 |
| 8 | 33075515 |
| 9 | 396906181 |
| 10 | 4762874171 |
| 11 | 57154490053 |
| 12 | 685853880635 |
| 13 | 8230246567621 |
| 14 | 98762958811451 |
| 15 | 1185155505737413 |
| 16 | 14221866068848955 |
| 17 | 170662392826187461 |