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 | 3 |
| 2 | 3 |
| 3 | 20 |
| 4 | 9 |
| 5 | 22 |
| 6 | 18 |
| 7 | 6 |
| 8 | 335 |
| 9 | 6816 |
| 10 | 24 |
| 11 | 11346 |
| 12 | 1824 |
| 13 | 1584 |
| 14 | 1398091 |
| 15 | 6462 |
| 16 | 64 |
| 17 | 144 |
| 18 | 135150 |
| 19 | 4464 |