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 | 42 |
| 2 | 1764 |
| 3 | 74088 |
| 4 | 3111696 |
| 5 | 130691232 |
| 6 | 5489031744 |
| 7 | 230539333248 |
| 8 | 9682651996416 |
| 9 | 406671383849472 |
| 10 | 17080198121677824 |
| 11 | 717368321110468608 |
| 12 | 30129469486639681536 |
| 13 | 1265437718438866624512 |
| 14 | 53148384174432398229504 |
| 15 | 2232232135326160725639168 |
| 16 | 93753749683698750476845056 |