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 | 2 |
| 2 | 34 |
| 3 | 55974 |
| 4 | 676491536028 |
| 5 | 406965070979714742549848209 |
| 6 | 597255854605931071381819520057048465533319700618519238060 |