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 | 2 |
| 2 | 6 |
| 3 | 39 |
| 4 | 467 |
| 5 | 10290 |
| 6 | 431844 |
| 7 | 33703065 |
| 8 | 4933593439 |
| 9 | 1353357158724 |
| 10 | 695062929397500 |
| 11 | 668849535352606829 |
| 12 | 1205528922118577365911 |