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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 6 |
| 5 | 2005 |
| 6 | 280971 |
| 7 | 22795136 |
| 8 | 1345702092 |
| 9 | 65250058251 |
| 10 | 2781911443317 |
| 11 | 108660434574142 |
| 12 | 3991349973006198 |
| 13 | 140293749275697017 |
| 14 | 4775521611056597583 |
| 15 | 158758002632650598268 |
| 16 | 5185922974307536588224 |