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 | 0 |
| 3 | 52 |
| 4 | 6378 |
| 5 | 622868 |
| 6 | 389969466 |
| 7 | 82787609160 |
| 8 | 20666425060328 |
| 9 | 2903212163753000 |
| 10 | 1025241126020698238 |