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 | 6 |
| 3 | 50 |
| 4 | 475 |
| 5 | 4881 |
| 6 | 52835 |
| 7 | 593382 |
| 8 | 6849415 |
| 9 | 80757819 |
| 10 | 968400940 |
| 11 | 11773656517 |
| 12 | 144791296055 |
| 13 | 1797935761182 |