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 | 1 |
| 2 | 6 |
| 3 | 186 |
| 4 | 29016 |
| 5 | 22661496 |
| 6 | 88515803376 |
| 7 | 1728802155736656 |
| 8 | 168827903320618878336 |
| 9 | 82435457461295106532780416 |
| 10 | 201258420458750640859769304304896 |
| 11 | 2456767777551003294245070550498298923776 |
| 12 | 149949204558598784020761783280669552547300269056 |