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 | 8 |
| 3 | 168 |
| 4 | 6336 |
| 5 | 360000 |
| 6 | 28728000 |
| 7 | 3067243200 |
| 8 | 422479411200 |
| 9 | 72968229734400 |
| 10 | 15446903472000000 |
| 11 | 3933958530902400000 |
| 12 | 1186723982675911680000 |
| 13 | 418497083472072084480000 |
| 14 | 170595438771094235458560000 |
| 15 | 79604772050991371184000000000 |
| 16 | 42160341403338557272473600000000 |