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 | 16 |
| 3 | 108864 |
| 4 | 2391175987200 |
| 5 | 615524208068689920000000 |
| 6 | 4831082166102613213870122703257600000000 |
| 7 | 2481336275198061145749280386508780674949224836628480000000000 |