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 | 16 |
| 3 | 20736 |
| 4 | 6879707136 |
| 5 | 1426576071720960000 |
| 6 | 383375999244747512217600000000 |
| 7 | 247370021455402476126653493805056000000000000 |