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 | 2 |
| 2 | 16 |
| 3 | 512 |
| 4 | 39330 |
| 5 | 9116396 |
| 6 | 4977655636 |
| 7 | 6910434801148 |
| 8 | 22619851307136958 |
| 9 | 176312563812861434000 |