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 | 12 |
| 2 | 2169 |
| 3 | 178478 |
| 4 | 4208945 |
| 5 | 48989176 |
| 6 | 364568617 |
| 7 | 1996813914 |
| 8 | 8804293473 |
| 9 | 33739007300 |
| 10 | 125937424601 |
| 11 | 570623341222 |
| 12 | 3881436747409 |
| 13 | 36314872537968 |
| 14 | 383799398752905 |
| 15 | 4185897925275026 |
| 16 | 45967322049616577 |
| 17 | 505481300395601404 |