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 | 1680 |
| 2 | 1680 |
| 3 | 1920 |
| 4 | 1920 |
| 5 | 2160 |
| 6 | 2160 |
| 7 | 2240 |
| 8 | 2240 |
| 9 | 3024 |
| 10 | 3024 |
| 11 | 3456 |
| 12 | 3456 |
| 13 | 4320 |
| 14 | 4320 |
| 15 | 5184 |
| 16 | 6480 |
| 17 | 6480 |
| 18 | 7560 |
| 19 | 7560 |
| 20 | 8640 |
| 21 | 8640 |
| 22 | 8640 |
| 23 | 12960 |
| 24 | 12960 |
| 25 | 13440 |
| 26 | 13440 |
| 27 | 45360 |
| 28 | 45360 |
| 29 | 362880 |
| 30 | 362880 |