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 | 120 |
| 2 | 1680 |
| 3 | 25200 |
| 4 | 27720 |
| 5 | 50400 |
| 6 | 83160 |
| 7 | 221760 |
| 8 | 277200 |
| 9 | 554400 |
| 10 | 720720 |
| 11 | 2162160 |
| 12 | 2882880 |
| 13 | 3603600 |
| 14 | 7207200 |
| 15 | 8648640 |
| 16 | 10810800 |
| 17 | 17297280 |
| 18 | 21621600 |
| 19 | 36756720 |
| 20 | 73513440 |
| 21 | 122522400 |
| 22 | 147026880 |
| 23 | 245044800 |
| 24 | 294053760 |
| 25 | 551350800 |
| 26 | 2095133040 |
| 27 | 2327925600 |
| 28 | 2793510720 |
| 29 | 3491888400 |