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) |
|---|---|
| 5 | 60 |
| 6 | 60 |
| 7 | 168 |
| 8 | 168 |
| 9 | 504 |
| 10 | 60 |
| 11 | 660 |
| 12 | 60 |
| 13 | 5616 |
| 14 | 168 |
| 15 | 60 |
| 16 | 336 |
| 17 | 4080 |
| 18 | 180 |
| 19 | 60822550204416000 |
| 20 | 60 |
| 21 | 168 |
| 22 | 1320 |
| 23 | 10200960 |
| 24 | 120 |
| 25 | 300 |
| 26 | 5616 |
| 27 | 1512 |
| 28 | 168 |
| 29 | 4420880996869850977271808000000 |
| 30 | 60 |