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 | 3 |
| 4 | 4 |
| 5 | 6 |
| 6 | 8 |
| 7 | 12 |
| 8 | 24 |
| 9 | 60 |
| 10 | 120 |
| 11 | 420 |
| 12 | 840 |
| 13 | 4620 |
| 14 | 9240 |
| 15 | 60060 |
| 16 | 120120 |
| 17 | 1021020 |
| 18 | 2042040 |
| 19 | 19399380 |
| 20 | 38798760 |
| 21 | 446185740 |
| 22 | 892371480 |