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 | 70 |
| 3 | 26599 |
| 4 | 33757360 |
| 5 | 107709888805 |
| 6 | 726401013530416 |
| 7 | 9197888739246870571 |
| 8 | 200656681438694771057920 |
| 9 | 7065183006232334215872360169 |
| 10 | 381446884048286939903298793116160 |
| 11 | 30299510478473850351087119774475282895 |
| 12 | 3422529682416045761005260546463028151218176 |