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 | 4 |
| 4 | 6 |
| 5 | 12 |
| 6 | 30 |
| 7 | 36 |
| 8 | 42 |
| 9 | 72 |
| 10 | 240 |
| 11 | 420 |
| 12 | 600 |
| 13 | 900 |
| 14 | 1560 |
| 15 | 1764 |
| 16 | 3600 |
| 17 | 6084 |
| 18 | 8100 |
| 19 | 46440 |
| 20 | 1742400 |
| 21 | 4062240 |
| 22 | 35814240 |