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 | 0 |
| 1 | 3 |
| 2 | 5 |
| 3 | 10 |
| 4 | 26 |
| 5 | 170 |
| 6 | 7226 |
| 7 | 13053770 |
| 8 | 42600227803226 |
| 9 | 453694852221687377444001770 |
| 10 | 51459754733114686962148583993443846186613037940783226 |