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 | 840 |
| 8 | 2520 |
| 9 | 27720 |
| 10 | 55440 |
| 11 | 720720 |
| 12 | 1081080 |
| 13 | 2162160 |
| 14 | 36756720 |
| 15 | 698377680 |
| 16 | 16062686640 |
| 17 | 48188059920 |
| 18 | 160626866400 |
| 19 | 240940299600 |
| 20 | 6987268688400 |
| 21 | 216605329340400 |
| 22 | 288807105787200 |
| 23 | 1010824870255200 |