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 | 4 |
| 2 | 120 |
| 3 | 32060 |
| 4 | 74323976 |
| 5 | 1494988224948 |
| 6 | 261421322089741976 |
| 7 | 398278555474658144086480 |
| 8 | 5298226825488439815883527067288 |