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 | 2 |
| 3 | 6 |
| 4 | 12 |
| 5 | 60 |
| 6 | 120 |
| 7 | 360 |
| 8 | 720 |
| 9 | 5040 |
| 10 | 10080 |
| 11 | 30240 |
| 12 | 60480 |
| 13 | 302400 |
| 14 | 907200 |
| 15 | 1814400 |
| 16 | 19958400 |
| 17 | 39916800 |
| 18 | 119750400 |
| 19 | 239500800 |
| 20 | 3113510400 |
| 21 | 6227020800 |
| 22 | 43589145600 |
| 23 | 87178291200 |
| 24 | 435891456000 |
| 25 | 1307674368000 |
| 26 | 2615348736000 |
| 27 | 44460928512000 |
| 28 | 88921857024000 |