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 | 4 |
| 3 | 6 |
| 4 | 84 |
| 5 | 120 |
| 6 | 784 |
| 7 | 280 |
| 8 | 40816 |
| 9 | 13806 |
| 10 | 1361706 |
| 11 | 110990 |
| 12 | 142633176 |
| 13 | 4263454 |
| 14 | 197730660 |
| 15 | 9246172320 |