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 | 5 |
| 3 | 7 |
| 4 | 9 |
| 5 | 21 |
| 6 | 22 |
| 7 | 44 |
| 8 | 45 |
| 9 | 66 |
| 10 | 70 |
| 11 | 78 |
| 12 | 112 |
| 13 | 150 |
| 14 | 156 |
| 15 | 160 |
| 16 | 264 |
| 17 | 270 |
| 18 | 280 |
| 19 | 432 |
| 20 | 600 |
| 21 | 1080 |
| 22 | 1680 |