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 | 18 |
| 6 | 24 |
| 7 | 54 |
| 8 | 48 |
| 9 | 72 |
| 10 | 96 |
| 11 | 270 |
| 12 | 120 |
| 13 | 450 |
| 14 | 384 |
| 15 | 288 |
| 16 | 240 |
| 17 | 2310 |
| 18 | 360 |
| 19 | 1890 |
| 20 | 480 |
| 21 | 1152 |
| 22 | 3150 |
| 23 | 4050 |
| 24 | 720 |
| 25 | 2592 |
| 26 | 6930 |
| 27 | 1800 |
| 28 | 1920 |
| 29 | 17010 |
| 30 | 1440 |