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 | 6 |
| 2 | 30 |
| 3 | 12 |
| 4 | 138 |
| 5 | 48 |
| 6 | 24 |
| 7 | 618 |
| 8 | 180 |
| 9 | 84 |
| 10 | 60 |
| 11 | 2730 |
| 12 | 792 |
| 13 | 264 |
| 14 | 192 |
| 15 | 180 |
| 16 | 11946 |
| 17 | 3444 |
| 18 | 1128 |
| 19 | 528 |
| 20 | 552 |
| 21 | 588 |