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 | 1 |
| 2 | 36 |
| 3 | 432 |
| 4 | 3600 |
| 5 | 24192 |
| 6 | 147456 |
| 7 | 829440 |
| 8 | 4460544 |
| 9 | 23003136 |
| 10 | 115605504 |
| 11 | 566231040 |
| 12 | 2727346176 |
| 13 | 12910067712 |