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 | 24 |
| 3 | 132 |
| 4 | 816 |
| 5 | 5448 |
| 6 | 38808 |
| 7 | 290568 |
| 8 | 2255232 |
| 9 | 17981532 |
| 10 | 146428728 |
| 11 | 1213014960 |
| 12 | 10192820592 |
| 13 | 86687830596 |
| 14 | 744919762584 |