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) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 29 |
| 3 | 905 |
| 4 | 835409 |
| 5 | 698981939105 |
| 6 | 488580362881004355588929 |
| 7 | 238710771078004490460834598457103704776369419905 |