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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 164 |
| 4 | 6400 |
| 5 | 404176 |
| 6 | 37541888 |
| 7 | 4814990144 |
| 8 | 815074508800 |
| 9 | 176018678814976 |
| 10 | 47223034903789568 |
| 11 | 15407438848482919424 |
| 12 | 6007522256082907955200 |
| 13 | 2758698201106509138251776 |
| 14 | 1473586749521302260021198848 |
| 15 | 905915791153129699969076117504 |