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 | 4 |
| 3 | 12 |
| 4 | 48 |
| 5 | 144 |
| 6 | 576 |
| 7 | 960 |
| 8 | 1260 |
| 9 | 3600 |
| 10 | 82944 |
| 11 | 46080 |
| 12 | 184320 |
| 13 | 2985984 |
| 14 | 129600 |
| 15 | 55440 |
| 16 | 6881280 |
| 17 | 14745600 |
| 18 | 58982400 |
| 19 | 106168320 |
| 20 | 907200 |
| 21 | 18662400 |
| 22 | 247669456896 |
| 23 | 1321205760 |
| 24 | 2494800 |
| 25 | 207360000 |
| 26 | 45158400 |
| 27 | 7761600 |
| 28 | 978447237120 |
| 29 | 543581798400 |
| 30 | 2174327193600 |
| 31 | 1014686023680 |