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 | 3 |
| 2 | 81 |
| 3 | 11092 |
| 4 | 7598355 |
| 5 | 31208037240 |
| 6 | 729358354663001 |
| 7 | 92792498733436652359 |