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 | 2 |
| 2 | 6 |
| 3 | 12 |
| 4 | 24 |
| 5 | 60 |
| 6 | 120 |
| 7 | 240 |
| 8 | 360 |
| 9 | 720 |
| 10 | 840 |
| 11 | 1260 |
| 12 | 1680 |
| 13 | 2520 |
| 14 | 5040 |
| 15 | 15120 |
| 16 | 20160 |
| 17 | 50400 |
| 18 | 55440 |
| 19 | 166320 |
| 20 | 332640 |
| 21 | 665280 |
| 22 | 2162160 |
| 23 | 3603600 |
| 24 | 4324320 |
| 25 | 8648640 |
| 26 | 17297280 |
| 27 | 32432400 |
| 28 | 43243200 |