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 | 64 |
| 3 | 112 |
| 4 | 58081 |
| 5 | 1319409 |
| 6 | 103489929 |
| 7 | 4085800416 |
| 8 | 226720727104 |
| 9 | 10445351809532 |
| 10 | 530909339760900 |
| 11 | 25591483232781872 |
| 12 | 1268920553028932644 |
| 13 | 61970903049203536750 |
| 14 | 3051063081822723807844 |
| 15 | 149565983362653741790314 |