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) |
|---|---|
| 1 | 0 |
| 2 | 13856 |
| 3 | 2940624 |
| 4 | 226810352 |
| 5 | 24130893568 |
| 6 | 4071813326144 |
| 7 | 609140174072448 |
| 8 | 78375823545772864 |