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 | 16 |
| 2 | 72 |
| 3 | 540 |
| 4 | 6300 |
| 5 | 92400 |
| 6 | 1681680 |
| 7 | 36756720 |
| 8 | 921470550 |
| 9 | 27886608750 |
| 10 | 970453984500 |
| 11 | 37905932634570 |