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 | 20 |
| 5 | 2 |
| 6 | 64 |
| 7 | 44 |
| 8 | 512 |
| 9 | 28 |
| 10 | 4 |
| 11 | 64 |
| 12 | 520 |
| 13 | 480 |
| 14 | 6720 |
| 15 | 43232 |
| 16 | 14400 |