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 | 6 |
| 2 | 35 |
| 3 | 694 |
| 4 | 26089 |
| 5 | 1862994 |
| 6 | 253247715 |
| 7 | 66799608630 |
| 8 | 34698378752226 |
| 9 | 35781375988234520 |
| 10 | 73534241823793715433 |
| 11 | 301714422751259316744750 |
| 12 | 2473763407036784492590791565 |
| 13 | 40547483778956508623734286010210 |