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 | 51 |
| 2 | 716 |
| 3 | 52680 |
| 4 | 3668759 |
| 5 | 266779524 |
| 6 | 19227454407 |
| 7 | 1386576216443 |
| 8 | 100026008988909 |
| 9 | 7214505515214571 |
| 10 | 520380715850845302 |
| 11 | 37534653006701646356 |
| 12 | 2707344505456485382130 |
| 13 | 195278730937825588935157 |