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 | 128 |
| 3 | 6765 |
| 4 | 265720 |
| 5 | 9112264 |
| 6 | 290926848 |
| 7 | 8916942687 |
| 8 | 266668876540 |
| 9 | 7853149169635 |
| 10 | 228982270335000 |
| 11 | 6632994268595136 |
| 12 | 191292945772217856 |
| 13 | 5500214758962096400 |
| 14 | 157819424038439232000 |
| 15 | 4521902974531722618723 |