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 | 18 |
| 1 | 24 |
| 2 | 432 |
| 3 | 10368 |
| 4 | 4478976 |
| 5 | 46438023168 |
| 6 | 207994791256915968 |
| 7 | 9658866935211987562213146624 |
| 8 | 2008994011967745042140303999261186371230892032 |