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 | 7 |
| 3 | 4116 |
| 4 | 2826802944 |
| 5 | 33920193794185101312 |
| 6 | 110137716338572837381278474323361792 |
| 7 | 1523742153535218423780156082312357202968690791891031031808 |