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) |
|---|---|
| 0 | 0 |
| 1 | 120 |
| 2 | 30240 |
| 3 | 360360 |
| 4 | 1860480 |
| 5 | 6375600 |
| 6 | 17100720 |
| 7 | 38955840 |
| 8 | 78960960 |
| 9 | 146611080 |
| 10 | 254251200 |
| 11 | 417451320 |
| 12 | 655381440 |
| 13 | 991186560 |
| 14 | 1452361680 |
| 15 | 2071126800 |
| 16 | 2884801920 |
| 17 | 3936182040 |
| 18 | 5273912160 |
| 19 | 6952862280 |
| 20 | 9034502400 |
| 21 | 11587277520 |
| 22 | 14686982640 |
| 23 | 18417137760 |