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 | 32 |
| 3 | 4608 |
| 4 | 7077888 |
| 5 | 101921587200 |
| 6 | 19725496300339200 |
| 7 | 49628717475771816345600 |