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 | 320 |
| 3 | 102400 |
| 4 | 5760000 |
| 5 | 324000000 |
| 6 | 34260048000 |
| 7 | 3622687928896 |
| 8 | 311933405047264 |
| 9 | 26859186077900176 |