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 | 2 |
| 3 | 18 |
| 4 | 98 |
| 5 | 33282 |
| 6 | 319994402 |
| 7 | 354455304050635218 |
| 8 | 36294953231792713902640647988908098 |