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 | 9 |
| 2 | 41472 |
| 3 | 14348907 |
| 4 | 1719926784 |
| 5 | 115330078125 |
| 6 | 5355700839936 |
| 7 | 193010051319183 |
| 8 | 5777633090469888 |
| 9 | 150094635296999121 |
| 10 | 3486784401000000000 |
| 11 | 73994897046174912819 |
| 12 | 1457274373159131021312 |
| 13 | 26955214582765006137717 |